Removed several synchronized locks.

L2J_Mobius_1.0_Ertheia/dist/game/data/scripts/ai/areas/BeastFarm/FeedableBeasts.java

@@ -413,14 +413,11 @@ public final class FeedableBeasts extends AbstractNpcAI
 		// if this is finally a trained mob, then despawn any other trained mobs that the
 		// player might have and initialize the Tamed Beast.
 		if (CommonUtil.contains(TAMED_BEASTS, nextNpcId))
-		{
-			if ((player.getTrainedBeasts() != null) && !player.getTrainedBeasts().isEmpty())
 		{
 			for (TamedBeastInstance oldTrained : player.getTrainedBeasts())
 			{
 				oldTrained.deleteMe();
 			}
-			}
 			
 			final TamedBeastInstance nextNpc = new TamedBeastInstance(nextNpcId, player, food - FOODSKILLDIFF, npc.getX(), npc.getY(), npc.getZ());
 			nextNpc.setRunning();

L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -51,7 +51,6 @@ import org.l2jmobius.commons.util.Rnd;
 import org.l2jmobius.gameserver.GameTimeController;
 import org.l2jmobius.gameserver.ItemsAutoDestroy;
 import org.l2jmobius.gameserver.LoginServerThread;
-import org.l2jmobius.gameserver.RecipeController;
 import org.l2jmobius.gameserver.ai.CreatureAI;
 import org.l2jmobius.gameserver.ai.CtrlIntention;
 import org.l2jmobius.gameserver.ai.PlayerAI;
@@ -114,6 +113,7 @@ import org.l2jmobius.gameserver.instancemanager.MatchingRoomManager;
 import org.l2jmobius.gameserver.instancemanager.MentorManager;
 import org.l2jmobius.gameserver.instancemanager.PunishmentManager;
 import org.l2jmobius.gameserver.instancemanager.QuestManager;
+import org.l2jmobius.gameserver.instancemanager.SellBuffsManager;
 import org.l2jmobius.gameserver.instancemanager.SiegeManager;
 import org.l2jmobius.gameserver.instancemanager.ZoneManager;
 import org.l2jmobius.gameserver.model.AccessLevel;
@@ -596,12 +596,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	private boolean _minimapAllowed = false;
 	
@@ -673,7 +673,7 @@ public final class PlayerInstance extends Playable
 	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -690,7 +690,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -713,7 +713,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private final Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -2025,11 +2025,7 @@ public final class PlayerInstance extends Playable
 	
 	public int getWeightPenalty()
 	{
-		if (_dietMode)
+		return _dietMode ? 0 : _curWeightPenalty;
-		{
-			return 0;
-		}
-		return _curWeightPenalty;
 	}
 	
 	/**
@@ -4305,9 +4301,16 @@ public final class PlayerInstance extends Playable
 			sendPacket(ActionFailed.STATIC_PACKET);
 			
 			if ((targetPlayer.getPrivateStoreType() == PrivateStoreType.SELL) || (targetPlayer.getPrivateStoreType() == PrivateStoreType.PACKAGE_SELL))
+			{
+				if (_isSellingBuffs)
+				{
+					SellBuffsManager.getInstance().sendBuffMenu(this, targetPlayer, 0);
+				}
+				else
 				{
 					sendPacket(new PrivateStoreListSell(this, targetPlayer));
 				}
+			}
 			else if (targetPlayer.getPrivateStoreType() == PrivateStoreType.BUY)
 			{
 				sendPacket(new PrivateStoreListBuy(this, targetPlayer));
@@ -5026,13 +5029,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5454,7 +5457,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5505,16 +5508,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5532,16 +5525,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10432,14 +10415,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10539,14 +10519,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -10936,16 +10913,6 @@ public final class PlayerInstance extends Playable
 			LOGGER.log(Level.SEVERE, "deleteMe()", e);
 		}
 		
-		// Stop crafting, if in progress
-		try
-		{
-			RecipeController.getInstance().requestMakeItemAbort(this);
-		}
-		catch (Exception e)
-		{
-			LOGGER.log(Level.SEVERE, "deleteMe()", e);
-		}
-		
 		// Cancel Attak or Cast
 		try
 		{
@@ -11750,38 +11717,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11791,8 +11747,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11804,8 +11759,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11838,7 +11792,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13250,7 +13204,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13293,7 +13247,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13312,7 +13266,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13331,7 +13285,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13699,22 +13653,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13723,7 +13667,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13733,7 +13677,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13741,12 +13685,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13757,7 +13701,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13777,7 +13721,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13786,7 +13730,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13818,16 +13762,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13918,16 +13852,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13937,7 +13861,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13951,11 +13875,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13964,11 +13887,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13978,11 +13900,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_1.0_Ertheia/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_2.5_Underground/dist/game/data/scripts/ai/areas/BeastFarm/FeedableBeasts.java

@@ -413,14 +413,11 @@ public final class FeedableBeasts extends AbstractNpcAI
 		// if this is finally a trained mob, then despawn any other trained mobs that the
 		// player might have and initialize the Tamed Beast.
 		if (CommonUtil.contains(TAMED_BEASTS, nextNpcId))
-		{
-			if ((player.getTrainedBeasts() != null) && !player.getTrainedBeasts().isEmpty())
 		{
 			for (TamedBeastInstance oldTrained : player.getTrainedBeasts())
 			{
 				oldTrained.deleteMe();
 			}
-			}
 			
 			final TamedBeastInstance nextNpc = new TamedBeastInstance(nextNpcId, player, food - FOODSKILLDIFF, npc.getX(), npc.getY(), npc.getZ());
 			nextNpc.setRunning();

L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -51,7 +51,6 @@ import org.l2jmobius.commons.util.Rnd;
 import org.l2jmobius.gameserver.GameTimeController;
 import org.l2jmobius.gameserver.ItemsAutoDestroy;
 import org.l2jmobius.gameserver.LoginServerThread;
-import org.l2jmobius.gameserver.RecipeController;
 import org.l2jmobius.gameserver.ai.CreatureAI;
 import org.l2jmobius.gameserver.ai.CtrlIntention;
 import org.l2jmobius.gameserver.ai.PlayerAI;
@@ -115,6 +114,7 @@ import org.l2jmobius.gameserver.instancemanager.MatchingRoomManager;
 import org.l2jmobius.gameserver.instancemanager.MentorManager;
 import org.l2jmobius.gameserver.instancemanager.PunishmentManager;
 import org.l2jmobius.gameserver.instancemanager.QuestManager;
+import org.l2jmobius.gameserver.instancemanager.SellBuffsManager;
 import org.l2jmobius.gameserver.instancemanager.SiegeManager;
 import org.l2jmobius.gameserver.instancemanager.ZoneManager;
 import org.l2jmobius.gameserver.model.AccessLevel;
@@ -598,12 +598,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	private boolean _minimapAllowed = false;
 	
@@ -675,7 +675,7 @@ public final class PlayerInstance extends Playable
 	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -692,7 +692,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -715,7 +715,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private final Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -2031,11 +2031,7 @@ public final class PlayerInstance extends Playable
 	
 	public int getWeightPenalty()
 	{
-		if (_dietMode)
+		return _dietMode ? 0 : _curWeightPenalty;
-		{
-			return 0;
-		}
-		return _curWeightPenalty;
 	}
 	
 	/**
@@ -4311,9 +4307,16 @@ public final class PlayerInstance extends Playable
 			sendPacket(ActionFailed.STATIC_PACKET);
 			
 			if ((targetPlayer.getPrivateStoreType() == PrivateStoreType.SELL) || (targetPlayer.getPrivateStoreType() == PrivateStoreType.PACKAGE_SELL))
+			{
+				if (_isSellingBuffs)
+				{
+					SellBuffsManager.getInstance().sendBuffMenu(this, targetPlayer, 0);
+				}
+				else
 				{
 					sendPacket(new PrivateStoreListSell(this, targetPlayer));
 				}
+			}
 			else if (targetPlayer.getPrivateStoreType() == PrivateStoreType.BUY)
 			{
 				sendPacket(new PrivateStoreListBuy(this, targetPlayer));
@@ -5032,13 +5035,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5460,7 +5463,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5511,16 +5514,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5538,16 +5531,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10439,14 +10422,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10546,14 +10526,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -10943,16 +10920,6 @@ public final class PlayerInstance extends Playable
 			LOGGER.log(Level.SEVERE, "deleteMe()", e);
 		}
 		
-		// Stop crafting, if in progress
-		try
-		{
-			RecipeController.getInstance().requestMakeItemAbort(this);
-		}
-		catch (Exception e)
-		{
-			LOGGER.log(Level.SEVERE, "deleteMe()", e);
-		}
-		
 		// Cancel Attak or Cast
 		try
 		{
@@ -11757,38 +11724,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11798,8 +11754,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11811,8 +11766,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11845,7 +11799,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13257,7 +13211,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13300,7 +13254,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13319,7 +13273,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13338,7 +13292,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13706,22 +13660,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13730,7 +13674,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13740,7 +13684,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13748,12 +13692,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13764,7 +13708,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13784,7 +13728,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13793,7 +13737,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13825,16 +13769,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13925,16 +13859,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13944,7 +13868,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13958,11 +13882,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13971,11 +13894,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13985,11 +13907,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_2.5_Underground/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_3.0_Helios/dist/game/data/scripts/ai/areas/BeastFarm/FeedableBeasts.java

@@ -413,14 +413,11 @@ public final class FeedableBeasts extends AbstractNpcAI
 		// if this is finally a trained mob, then despawn any other trained mobs that the
 		// player might have and initialize the Tamed Beast.
 		if (CommonUtil.contains(TAMED_BEASTS, nextNpcId))
-		{
-			if ((player.getTrainedBeasts() != null) && !player.getTrainedBeasts().isEmpty())
 		{
 			for (TamedBeastInstance oldTrained : player.getTrainedBeasts())
 			{
 				oldTrained.deleteMe();
 			}
-			}
 			
 			final TamedBeastInstance nextNpc = new TamedBeastInstance(nextNpcId, player, food - FOODSKILLDIFF, npc.getX(), npc.getY(), npc.getZ());
 			nextNpc.setRunning();

L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -51,7 +51,6 @@ import org.l2jmobius.commons.util.Rnd;
 import org.l2jmobius.gameserver.GameTimeController;
 import org.l2jmobius.gameserver.ItemsAutoDestroy;
 import org.l2jmobius.gameserver.LoginServerThread;
-import org.l2jmobius.gameserver.RecipeController;
 import org.l2jmobius.gameserver.ai.CreatureAI;
 import org.l2jmobius.gameserver.ai.CtrlIntention;
 import org.l2jmobius.gameserver.ai.PlayerAI;
@@ -116,6 +115,7 @@ import org.l2jmobius.gameserver.instancemanager.MatchingRoomManager;
 import org.l2jmobius.gameserver.instancemanager.MentorManager;
 import org.l2jmobius.gameserver.instancemanager.PunishmentManager;
 import org.l2jmobius.gameserver.instancemanager.QuestManager;
+import org.l2jmobius.gameserver.instancemanager.SellBuffsManager;
 import org.l2jmobius.gameserver.instancemanager.SiegeManager;
 import org.l2jmobius.gameserver.instancemanager.ZoneManager;
 import org.l2jmobius.gameserver.model.AccessLevel;
@@ -600,12 +600,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	private boolean _minimapAllowed = false;
 	
@@ -677,7 +677,7 @@ public final class PlayerInstance extends Playable
 	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -694,7 +694,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -717,7 +717,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private final Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -2033,11 +2033,7 @@ public final class PlayerInstance extends Playable
 	
 	public int getWeightPenalty()
 	{
-		if (_dietMode)
+		return _dietMode ? 0 : _curWeightPenalty;
-		{
-			return 0;
-		}
-		return _curWeightPenalty;
 	}
 	
 	/**
@@ -4313,9 +4309,16 @@ public final class PlayerInstance extends Playable
 			sendPacket(ActionFailed.STATIC_PACKET);
 			
 			if ((targetPlayer.getPrivateStoreType() == PrivateStoreType.SELL) || (targetPlayer.getPrivateStoreType() == PrivateStoreType.PACKAGE_SELL))
+			{
+				if (_isSellingBuffs)
+				{
+					SellBuffsManager.getInstance().sendBuffMenu(this, targetPlayer, 0);
+				}
+				else
 				{
 					sendPacket(new PrivateStoreListSell(this, targetPlayer));
 				}
+			}
 			else if (targetPlayer.getPrivateStoreType() == PrivateStoreType.BUY)
 			{
 				sendPacket(new PrivateStoreListBuy(this, targetPlayer));
@@ -5034,13 +5037,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5462,7 +5465,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5513,16 +5516,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5540,16 +5533,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10441,14 +10424,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10548,14 +10528,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -10945,16 +10922,6 @@ public final class PlayerInstance extends Playable
 			LOGGER.log(Level.SEVERE, "deleteMe()", e);
 		}
 		
-		// Stop crafting, if in progress
-		try
-		{
-			RecipeController.getInstance().requestMakeItemAbort(this);
-		}
-		catch (Exception e)
-		{
-			LOGGER.log(Level.SEVERE, "deleteMe()", e);
-		}
-		
 		// Cancel Attak or Cast
 		try
 		{
@@ -11759,38 +11726,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11800,8 +11756,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11813,8 +11768,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11847,7 +11801,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13260,7 +13214,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13303,7 +13257,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13322,7 +13276,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13341,7 +13295,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13709,22 +13663,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13733,7 +13677,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13743,7 +13687,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13751,12 +13695,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13767,7 +13711,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13787,7 +13731,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13796,7 +13740,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13828,16 +13772,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13928,16 +13862,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13947,7 +13871,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13961,11 +13885,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13974,11 +13897,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13988,11 +13910,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_3.0_Helios/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_4.0_GrandCrusade/dist/game/data/scripts/ai/areas/BeastFarm/FeedableBeasts.java

@@ -413,14 +413,11 @@ public final class FeedableBeasts extends AbstractNpcAI
 		// if this is finally a trained mob, then despawn any other trained mobs that the
 		// player might have and initialize the Tamed Beast.
 		if (CommonUtil.contains(TAMED_BEASTS, nextNpcId))
-		{
-			if ((player.getTrainedBeasts() != null) && !player.getTrainedBeasts().isEmpty())
 		{
 			for (TamedBeastInstance oldTrained : player.getTrainedBeasts())
 			{
 				oldTrained.deleteMe();
 			}
-			}
 			
 			final TamedBeastInstance nextNpc = new TamedBeastInstance(nextNpcId, player, food - FOODSKILLDIFF, npc.getX(), npc.getY(), npc.getZ());
 			nextNpc.setRunning();

L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -605,12 +605,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	// client radar
 	// TODO: This needs to be better integrated and saved/loaded
@@ -677,10 +677,10 @@ public final class PlayerInstance extends Playable
 	private long _spawnProtectEndTime = 0;
 	private long _teleportProtectEndTime = 0;
 	
-	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
+	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos = new ConcurrentHashMap<>();
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -701,7 +701,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -724,7 +724,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -5032,13 +5032,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5460,7 +5460,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5511,16 +5511,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5538,16 +5528,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10435,14 +10415,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10542,14 +10519,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -11743,38 +11717,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11784,8 +11747,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11797,8 +11759,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11831,7 +11792,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13243,7 +13204,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13286,7 +13247,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13305,7 +13266,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13324,7 +13285,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13684,22 +13645,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13708,7 +13659,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13718,7 +13669,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13726,12 +13677,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13742,7 +13693,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13762,7 +13713,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13771,7 +13722,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13803,16 +13754,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13903,16 +13844,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13922,7 +13853,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13936,11 +13867,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13949,11 +13879,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13963,11 +13892,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_4.0_GrandCrusade/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_5.0_Salvation/dist/game/data/scripts/ai/areas/BeastFarm/FeedableBeasts.java

@@ -413,14 +413,11 @@ public final class FeedableBeasts extends AbstractNpcAI
 		// if this is finally a trained mob, then despawn any other trained mobs that the
 		// player might have and initialize the Tamed Beast.
 		if (CommonUtil.contains(TAMED_BEASTS, nextNpcId))
-		{
-			if ((player.getTrainedBeasts() != null) && !player.getTrainedBeasts().isEmpty())
 		{
 			for (TamedBeastInstance oldTrained : player.getTrainedBeasts())
 			{
 				oldTrained.deleteMe();
 			}
-			}
 			
 			final TamedBeastInstance nextNpc = new TamedBeastInstance(nextNpcId, player, food - FOODSKILLDIFF, npc.getX(), npc.getY(), npc.getZ());
 			nextNpc.setRunning();

L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -603,12 +603,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	// client radar
 	// TODO: This needs to be better integrated and saved/loaded
@@ -675,10 +675,10 @@ public final class PlayerInstance extends Playable
 	private long _spawnProtectEndTime = 0;
 	private long _teleportProtectEndTime = 0;
 	
-	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
+	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos = new ConcurrentHashMap<>();
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -699,7 +699,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -722,7 +722,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -5013,13 +5013,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5441,7 +5441,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5492,16 +5492,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5519,16 +5509,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10425,14 +10405,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10532,14 +10509,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -11733,38 +11707,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11774,8 +11737,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11787,8 +11749,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11821,7 +11782,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13233,7 +13194,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13276,7 +13237,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13295,7 +13256,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13314,7 +13275,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13674,22 +13635,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13698,7 +13649,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13708,7 +13659,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13716,12 +13667,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13732,7 +13683,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13752,7 +13703,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13761,7 +13712,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13793,16 +13744,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13892,16 +13833,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13911,7 +13842,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13925,11 +13856,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13938,11 +13868,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13952,11 +13881,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_5.0_Salvation/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_5.5_EtinasFate/dist/game/data/scripts/ai/areas/BeastFarm/FeedableBeasts.java

@@ -412,14 +412,11 @@ public final class FeedableBeasts extends AbstractNpcAI
 		// if this is finally a trained mob, then despawn any other trained mobs that the
 		// player might have and initialize the Tamed Beast.
 		if (CommonUtil.contains(TAMED_BEASTS, nextNpcId))
-		{
-			if ((player.getTrainedBeasts() != null) && !player.getTrainedBeasts().isEmpty())
 		{
 			for (TamedBeastInstance oldTrained : player.getTrainedBeasts())
 			{
 				oldTrained.deleteMe();
 			}
-			}
 			
 			final TamedBeastInstance nextNpc = new TamedBeastInstance(nextNpcId, player, food - FOODSKILLDIFF, npc.getX(), npc.getY(), npc.getZ());
 			nextNpc.setRunning();

L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -603,12 +603,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	// client radar
 	// TODO: This needs to be better integrated and saved/loaded
@@ -675,10 +675,10 @@ public final class PlayerInstance extends Playable
 	private long _spawnProtectEndTime = 0;
 	private long _teleportProtectEndTime = 0;
 	
-	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
+	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos = new ConcurrentHashMap<>();
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -699,7 +699,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -722,7 +722,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -5013,13 +5013,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5441,7 +5441,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5492,16 +5492,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5519,16 +5509,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10425,14 +10405,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10532,14 +10509,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -11733,38 +11707,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11774,8 +11737,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11787,8 +11749,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11821,7 +11782,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13233,7 +13194,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13276,7 +13237,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13295,7 +13256,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13314,7 +13275,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13674,22 +13635,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13698,7 +13649,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13708,7 +13659,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13716,12 +13667,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13732,7 +13683,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13752,7 +13703,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13761,7 +13712,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13793,16 +13744,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13892,16 +13833,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13911,7 +13842,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13925,11 +13856,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13938,11 +13868,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13952,11 +13881,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_5.5_EtinasFate/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_6.0_Fafurion/dist/game/data/scripts/ai/areas/BeastFarm/FeedableBeasts.java

@@ -412,14 +412,11 @@ public final class FeedableBeasts extends AbstractNpcAI
 		// if this is finally a trained mob, then despawn any other trained mobs that the
 		// player might have and initialize the Tamed Beast.
 		if (CommonUtil.contains(TAMED_BEASTS, nextNpcId))
-		{
-			if ((player.getTrainedBeasts() != null) && !player.getTrainedBeasts().isEmpty())
 		{
 			for (TamedBeastInstance oldTrained : player.getTrainedBeasts())
 			{
 				oldTrained.deleteMe();
 			}
-			}
 			
 			final TamedBeastInstance nextNpc = new TamedBeastInstance(nextNpcId, player, food - FOODSKILLDIFF, npc.getX(), npc.getY(), npc.getZ());
 			nextNpc.setRunning();

L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -603,12 +603,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	// client radar
 	// TODO: This needs to be better integrated and saved/loaded
@@ -675,10 +675,10 @@ public final class PlayerInstance extends Playable
 	private long _spawnProtectEndTime = 0;
 	private long _teleportProtectEndTime = 0;
 	
-	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
+	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos = new ConcurrentHashMap<>();
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -699,7 +699,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -722,7 +722,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -5014,13 +5014,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5442,7 +5442,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5493,16 +5493,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5520,16 +5510,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10431,14 +10411,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10538,14 +10515,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -11739,38 +11713,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11780,8 +11743,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11793,8 +11755,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11827,7 +11788,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13239,7 +13200,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13282,7 +13243,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13301,7 +13262,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13320,7 +13281,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13680,22 +13641,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13704,7 +13655,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13714,7 +13665,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13722,12 +13673,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13738,7 +13689,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13758,7 +13709,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13767,7 +13718,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13799,16 +13750,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13898,16 +13839,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13917,7 +13848,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13931,11 +13862,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13944,11 +13874,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13958,11 +13887,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_6.0_Fafurion/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_C6_Interlude/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -31,7 +31,6 @@ import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
-import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.Future;
 import java.util.concurrent.ScheduledFuture;
@@ -462,7 +461,7 @@ public final class PlayerInstance extends Playable
 	private int _masteryPenalty = 0;
 	private ItemInstance _activeEnchantItem = null;
 	protected boolean _inventoryDisable = false;
-	protected Map<Integer, CubicInstance> _cubics = new HashMap<>();
+	protected Map<Integer, CubicInstance> _cubics = new ConcurrentHashMap<>();
 	protected Map<Integer, Integer> _activeSoulShots = new ConcurrentHashMap<>();
 	public final ReentrantLock soulShotLock = new ReentrantLock();
 	public Quest dialog = null;
@@ -710,8 +709,6 @@ public final class PlayerInstance extends Playable
 			// cancel the recent fake-death protection instantly if the player attacks or casts spells
 			getPlayer().setRecentFakeDeath(false);
 			
-			synchronized (_cubics)
-			{
 			for (CubicInstance cubic : _cubics.values())
 			{
 				if (cubic.getId() != CubicInstance.LIFE_CUBIC)
@@ -720,7 +717,6 @@ public final class PlayerInstance extends Playable
 				}
 			}
 		}
-		}
 		
 		@Override
 		public void doCast(Skill skill)
@@ -769,8 +765,6 @@ public final class PlayerInstance extends Playable
 						return;
 					}
 					
-					synchronized (_cubics)
-					{
 					for (CubicInstance cubic : _cubics.values())
 					{
 						if ((cubic != null) && (cubic.getId() != CubicInstance.LIFE_CUBIC))
@@ -778,7 +772,6 @@ public final class PlayerInstance extends Playable
 							cubic.doAction();
 						}
 					}
-					}
 					break;
 				}
 			}
@@ -1328,7 +1321,6 @@ public final class PlayerInstance extends Playable
 				}
 			}
 		}
-		
 		return _ai;
 	}
 	
@@ -3571,7 +3563,6 @@ public final class PlayerInstance extends Playable
 	{
 		synchronized (_movingTaskDefined)
 		{
-			
 			if (!_movingTaskDefined)
 			{
 				return;
@@ -11910,13 +11901,9 @@ public final class PlayerInstance extends Playable
 	 * @return the cubics
 	 */
 	public Map<Integer, CubicInstance> getCubics()
-	{
-		synchronized (_cubics)
 	{
 		// clean cubics instances
-			final Set<Integer> cubicsIds = _cubics.keySet();
+		for (Integer id : _cubics.keySet())
-			
-			for (Integer id : cubicsIds)
 		{
 			if ((id == null) || (_cubics.get(id) == null))
 			{
@@ -11933,7 +11920,6 @@ public final class PlayerInstance extends Playable
 		
 		return _cubics;
 	}
-	}
 	
 	/**
 	 * Add a CubicInstance to the PlayerInstance _cubics.<BR>
@@ -11949,12 +11935,8 @@ public final class PlayerInstance extends Playable
 	public void addCubic(int id, int level, double matk, int activationtime, int activationchance, int totalLifetime, boolean givenByOther)
 	{
 		final CubicInstance cubic = new CubicInstance(this, id, level, (int) matk, activationtime, activationchance, totalLifetime, givenByOther);
-		
-		synchronized (_cubics)
-		{
 		_cubics.put(id, cubic);
 	}
-	}
 	
 	/**
 	 * Remove a CubicInstance from the PlayerInstance _cubics.<BR>
@@ -11962,12 +11944,9 @@ public final class PlayerInstance extends Playable
 	 * @param id the id
 	 */
 	public void delCubic(int id)
-	{
-		synchronized (_cubics)
 	{
 		_cubics.remove(id);
 	}
-	}
 	
 	/**
 	 * Return the CubicInstance corresponding to the Identifier of the PlayerInstance _cubics.<BR>
@@ -11976,18 +11955,13 @@ public final class PlayerInstance extends Playable
 	 * @return the cubic
 	 */
 	public CubicInstance getCubic(int id)
-	{
-		synchronized (_cubics)
 	{
 		return _cubics.get(id);
 	}
-	}
 	
 	public void unsummonAllCubics()
 	{
 		// Unsummon Cubics
-		synchronized (_cubics)
-		{
 		if (_cubics.size() > 0)
 		{
 			for (CubicInstance cubic : _cubics.values())
@@ -11999,7 +11973,6 @@ public final class PlayerInstance extends Playable
 			_cubics.clear();
 		}
 	}
-	}
 	
 	@Override
 	public String toString()
@@ -13700,12 +13673,10 @@ public final class PlayerInstance extends Playable
 		
 		synchronized (getAllSkills())
 		{
-			
 			for (Skill oldSkill : getAllSkills())
 			{
 				super.removeSkill(oldSkill);
 			}
-			
 		}
 		
 		// Rebind CursedWeapon passive.

L2J_Mobius_CT_2.6_HighFive/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -5008,13 +5008,13 @@ public final class PlayerInstance extends Playable
 			stopFeed();
 		}
 		
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (_isFakeDeath)
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		if (killer != null)
 		{

L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -51,7 +51,6 @@ import org.l2jmobius.commons.util.Rnd;
 import org.l2jmobius.gameserver.GameTimeController;
 import org.l2jmobius.gameserver.ItemsAutoDestroy;
 import org.l2jmobius.gameserver.LoginServerThread;
-import org.l2jmobius.gameserver.RecipeController;
 import org.l2jmobius.gameserver.ai.CreatureAI;
 import org.l2jmobius.gameserver.ai.CtrlIntention;
 import org.l2jmobius.gameserver.ai.PlayerAI;
@@ -115,6 +114,7 @@ import org.l2jmobius.gameserver.instancemanager.MatchingRoomManager;
 import org.l2jmobius.gameserver.instancemanager.MentorManager;
 import org.l2jmobius.gameserver.instancemanager.PunishmentManager;
 import org.l2jmobius.gameserver.instancemanager.QuestManager;
+import org.l2jmobius.gameserver.instancemanager.SellBuffsManager;
 import org.l2jmobius.gameserver.instancemanager.SiegeManager;
 import org.l2jmobius.gameserver.instancemanager.ZoneManager;
 import org.l2jmobius.gameserver.model.AccessLevel;
@@ -594,12 +594,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	private boolean _minimapAllowed = false;
 	
@@ -671,7 +671,7 @@ public final class PlayerInstance extends Playable
 	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -688,7 +688,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -711,7 +711,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private final Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -2006,11 +2006,7 @@ public final class PlayerInstance extends Playable
 	
 	public int getWeightPenalty()
 	{
-		if (_dietMode)
+		return _dietMode ? 0 : _curWeightPenalty;
-		{
-			return 0;
-		}
-		return _curWeightPenalty;
 	}
 	
 	/**
@@ -4280,9 +4276,16 @@ public final class PlayerInstance extends Playable
 			sendPacket(ActionFailed.STATIC_PACKET);
 			
 			if ((targetPlayer.getPrivateStoreType() == PrivateStoreType.SELL) || (targetPlayer.getPrivateStoreType() == PrivateStoreType.PACKAGE_SELL))
+			{
+				if (_isSellingBuffs)
+				{
+					SellBuffsManager.getInstance().sendBuffMenu(this, targetPlayer, 0);
+				}
+				else
 				{
 					sendPacket(new PrivateStoreListSell(this, targetPlayer));
 				}
+			}
 			else if (targetPlayer.getPrivateStoreType() == PrivateStoreType.BUY)
 			{
 				sendPacket(new PrivateStoreListBuy(this, targetPlayer));
@@ -4998,13 +5001,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5425,7 +5428,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5476,16 +5479,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5503,16 +5496,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10367,14 +10350,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10474,14 +10454,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -10871,16 +10848,6 @@ public final class PlayerInstance extends Playable
 			LOGGER.log(Level.SEVERE, "deleteMe()", e);
 		}
 		
-		// Stop crafting, if in progress
-		try
-		{
-			RecipeController.getInstance().requestMakeItemAbort(this);
-		}
-		catch (Exception e)
-		{
-			LOGGER.log(Level.SEVERE, "deleteMe()", e);
-		}
-		
 		// Cancel Attak or Cast
 		try
 		{
@@ -11592,38 +11559,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11633,8 +11589,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11646,8 +11601,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11680,7 +11634,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13093,7 +13047,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13136,7 +13090,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13155,7 +13109,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13174,7 +13128,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13542,22 +13496,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13566,7 +13510,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13576,7 +13520,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13584,12 +13528,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13600,7 +13544,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13620,7 +13564,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13629,7 +13573,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13661,16 +13605,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13761,16 +13695,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13780,7 +13704,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13794,11 +13718,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13807,11 +13730,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13821,11 +13743,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_Classic_2.0_Saviors/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -51,7 +51,6 @@ import org.l2jmobius.commons.util.Rnd;
 import org.l2jmobius.gameserver.GameTimeController;
 import org.l2jmobius.gameserver.ItemsAutoDestroy;
 import org.l2jmobius.gameserver.LoginServerThread;
-import org.l2jmobius.gameserver.RecipeController;
 import org.l2jmobius.gameserver.ai.CreatureAI;
 import org.l2jmobius.gameserver.ai.CtrlIntention;
 import org.l2jmobius.gameserver.ai.PlayerAI;
@@ -115,6 +114,7 @@ import org.l2jmobius.gameserver.instancemanager.MatchingRoomManager;
 import org.l2jmobius.gameserver.instancemanager.MentorManager;
 import org.l2jmobius.gameserver.instancemanager.PunishmentManager;
 import org.l2jmobius.gameserver.instancemanager.QuestManager;
+import org.l2jmobius.gameserver.instancemanager.SellBuffsManager;
 import org.l2jmobius.gameserver.instancemanager.SiegeManager;
 import org.l2jmobius.gameserver.instancemanager.ZoneManager;
 import org.l2jmobius.gameserver.model.AccessLevel;
@@ -595,12 +595,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	private boolean _minimapAllowed = false;
 	
@@ -672,7 +672,7 @@ public final class PlayerInstance extends Playable
 	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -689,7 +689,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -712,7 +712,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private final Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -2007,11 +2007,7 @@ public final class PlayerInstance extends Playable
 	
 	public int getWeightPenalty()
 	{
-		if (_dietMode)
+		return _dietMode ? 0 : _curWeightPenalty;
-		{
-			return 0;
-		}
-		return _curWeightPenalty;
 	}
 	
 	/**
@@ -4281,9 +4277,16 @@ public final class PlayerInstance extends Playable
 			sendPacket(ActionFailed.STATIC_PACKET);
 			
 			if ((targetPlayer.getPrivateStoreType() == PrivateStoreType.SELL) || (targetPlayer.getPrivateStoreType() == PrivateStoreType.PACKAGE_SELL))
+			{
+				if (_isSellingBuffs)
+				{
+					SellBuffsManager.getInstance().sendBuffMenu(this, targetPlayer, 0);
+				}
+				else
 				{
 					sendPacket(new PrivateStoreListSell(this, targetPlayer));
 				}
+			}
 			else if (targetPlayer.getPrivateStoreType() == PrivateStoreType.BUY)
 			{
 				sendPacket(new PrivateStoreListBuy(this, targetPlayer));
@@ -4999,13 +5002,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5426,7 +5429,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5477,16 +5480,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5504,16 +5497,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10374,14 +10357,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10481,14 +10461,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -10878,16 +10855,6 @@ public final class PlayerInstance extends Playable
 			LOGGER.log(Level.SEVERE, "deleteMe()", e);
 		}
 		
-		// Stop crafting, if in progress
-		try
-		{
-			RecipeController.getInstance().requestMakeItemAbort(this);
-		}
-		catch (Exception e)
-		{
-			LOGGER.log(Level.SEVERE, "deleteMe()", e);
-		}
-		
 		// Cancel Attak or Cast
 		try
 		{
@@ -11599,38 +11566,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11640,8 +11596,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11653,8 +11608,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11687,7 +11641,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13100,7 +13054,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13143,7 +13097,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13162,7 +13116,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13181,7 +13135,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13549,22 +13503,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13573,7 +13517,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13583,7 +13527,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13591,12 +13535,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13607,7 +13551,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13627,7 +13571,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13636,7 +13580,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13668,16 +13612,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13768,16 +13702,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13787,7 +13711,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13801,11 +13725,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13814,11 +13737,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13828,11 +13750,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_Classic_2.1_Zaken/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -51,7 +51,6 @@ import org.l2jmobius.commons.util.Rnd;
 import org.l2jmobius.gameserver.GameTimeController;
 import org.l2jmobius.gameserver.ItemsAutoDestroy;
 import org.l2jmobius.gameserver.LoginServerThread;
-import org.l2jmobius.gameserver.RecipeController;
 import org.l2jmobius.gameserver.ai.CreatureAI;
 import org.l2jmobius.gameserver.ai.CtrlIntention;
 import org.l2jmobius.gameserver.ai.PlayerAI;
@@ -115,6 +114,7 @@ import org.l2jmobius.gameserver.instancemanager.MatchingRoomManager;
 import org.l2jmobius.gameserver.instancemanager.MentorManager;
 import org.l2jmobius.gameserver.instancemanager.PunishmentManager;
 import org.l2jmobius.gameserver.instancemanager.QuestManager;
+import org.l2jmobius.gameserver.instancemanager.SellBuffsManager;
 import org.l2jmobius.gameserver.instancemanager.SiegeManager;
 import org.l2jmobius.gameserver.instancemanager.ZoneManager;
 import org.l2jmobius.gameserver.model.AccessLevel;
@@ -593,12 +593,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	private boolean _minimapAllowed = false;
 	
@@ -670,7 +670,7 @@ public final class PlayerInstance extends Playable
 	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -687,7 +687,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -710,7 +710,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private final Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -2005,11 +2005,7 @@ public final class PlayerInstance extends Playable
 	
 	public int getWeightPenalty()
 	{
-		if (_dietMode)
+		return _dietMode ? 0 : _curWeightPenalty;
-		{
-			return 0;
-		}
-		return _curWeightPenalty;
 	}
 	
 	/**
@@ -4264,9 +4260,16 @@ public final class PlayerInstance extends Playable
 			sendPacket(ActionFailed.STATIC_PACKET);
 			
 			if ((targetPlayer.getPrivateStoreType() == PrivateStoreType.SELL) || (targetPlayer.getPrivateStoreType() == PrivateStoreType.PACKAGE_SELL))
+			{
+				if (_isSellingBuffs)
+				{
+					SellBuffsManager.getInstance().sendBuffMenu(this, targetPlayer, 0);
+				}
+				else
 				{
 					sendPacket(new PrivateStoreListSell(this, targetPlayer));
 				}
+			}
 			else if (targetPlayer.getPrivateStoreType() == PrivateStoreType.BUY)
 			{
 				sendPacket(new PrivateStoreListBuy(this, targetPlayer));
@@ -4983,13 +4986,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5410,7 +5413,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5461,16 +5464,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5488,16 +5481,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10359,14 +10342,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10466,14 +10446,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -10863,16 +10840,6 @@ public final class PlayerInstance extends Playable
 			LOGGER.log(Level.SEVERE, "deleteMe()", e);
 		}
 		
-		// Stop crafting, if in progress
-		try
-		{
-			RecipeController.getInstance().requestMakeItemAbort(this);
-		}
-		catch (Exception e)
-		{
-			LOGGER.log(Level.SEVERE, "deleteMe()", e);
-		}
-		
 		// Cancel Attak or Cast
 		try
 		{
@@ -11584,38 +11551,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11625,8 +11581,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11638,8 +11593,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11672,7 +11626,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13085,7 +13039,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13128,7 +13082,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13147,7 +13101,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13166,7 +13120,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13534,22 +13488,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13558,7 +13502,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13568,7 +13512,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13576,12 +13520,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13592,7 +13536,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13612,7 +13556,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13621,7 +13565,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13653,16 +13597,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13752,16 +13686,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13771,7 +13695,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13785,11 +13709,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13798,11 +13721,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13812,11 +13734,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_Classic_2.2_Antharas/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -51,7 +51,6 @@ import org.l2jmobius.commons.util.Rnd;
 import org.l2jmobius.gameserver.GameTimeController;
 import org.l2jmobius.gameserver.ItemsAutoDestroy;
 import org.l2jmobius.gameserver.LoginServerThread;
-import org.l2jmobius.gameserver.RecipeController;
 import org.l2jmobius.gameserver.ai.CreatureAI;
 import org.l2jmobius.gameserver.ai.CtrlIntention;
 import org.l2jmobius.gameserver.ai.PlayerAI;
@@ -115,6 +114,7 @@ import org.l2jmobius.gameserver.instancemanager.MatchingRoomManager;
 import org.l2jmobius.gameserver.instancemanager.MentorManager;
 import org.l2jmobius.gameserver.instancemanager.PunishmentManager;
 import org.l2jmobius.gameserver.instancemanager.QuestManager;
+import org.l2jmobius.gameserver.instancemanager.SellBuffsManager;
 import org.l2jmobius.gameserver.instancemanager.SiegeManager;
 import org.l2jmobius.gameserver.instancemanager.ZoneManager;
 import org.l2jmobius.gameserver.model.AccessLevel;
@@ -593,12 +593,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	private boolean _minimapAllowed = false;
 	
@@ -670,7 +670,7 @@ public final class PlayerInstance extends Playable
 	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -687,7 +687,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -710,7 +710,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private final Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -2005,11 +2005,7 @@ public final class PlayerInstance extends Playable
 	
 	public int getWeightPenalty()
 	{
-		if (_dietMode)
+		return _dietMode ? 0 : _curWeightPenalty;
-		{
-			return 0;
-		}
-		return _curWeightPenalty;
 	}
 	
 	/**
@@ -4264,9 +4260,16 @@ public final class PlayerInstance extends Playable
 			sendPacket(ActionFailed.STATIC_PACKET);
 			
 			if ((targetPlayer.getPrivateStoreType() == PrivateStoreType.SELL) || (targetPlayer.getPrivateStoreType() == PrivateStoreType.PACKAGE_SELL))
+			{
+				if (_isSellingBuffs)
+				{
+					SellBuffsManager.getInstance().sendBuffMenu(this, targetPlayer, 0);
+				}
+				else
 				{
 					sendPacket(new PrivateStoreListSell(this, targetPlayer));
 				}
+			}
 			else if (targetPlayer.getPrivateStoreType() == PrivateStoreType.BUY)
 			{
 				sendPacket(new PrivateStoreListBuy(this, targetPlayer));
@@ -4983,13 +4986,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5410,7 +5413,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5461,16 +5464,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5488,16 +5481,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10359,14 +10342,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10466,14 +10446,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -10863,16 +10840,6 @@ public final class PlayerInstance extends Playable
 			LOGGER.log(Level.SEVERE, "deleteMe()", e);
 		}
 		
-		// Stop crafting, if in progress
-		try
-		{
-			RecipeController.getInstance().requestMakeItemAbort(this);
-		}
-		catch (Exception e)
-		{
-			LOGGER.log(Level.SEVERE, "deleteMe()", e);
-		}
-		
 		// Cancel Attak or Cast
 		try
 		{
@@ -11584,38 +11551,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11625,8 +11581,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11638,8 +11593,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11672,7 +11626,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13085,7 +13039,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13128,7 +13082,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13147,7 +13101,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13166,7 +13120,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13534,22 +13488,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13558,7 +13502,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13568,7 +13512,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13576,12 +13520,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13592,7 +13536,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13612,7 +13556,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13621,7 +13565,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13653,16 +13597,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13752,16 +13686,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13771,7 +13695,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13785,11 +13709,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13798,11 +13721,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13812,11 +13734,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_Classic_2.3_SevenSigns/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}

L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/EffectList.java

@@ -712,7 +712,7 @@ public final class EffectList
 	 * @param info
 	 * @param removed
 	 */
-	private synchronized void removeActive(BuffInfo info, boolean removed)
+	private void removeActive(BuffInfo info, boolean removed)
 	{
 		if (!_actives.isEmpty())
 		{
@@ -790,7 +790,7 @@ public final class EffectList
 		updateEffectList(true);
 	}
 	
-	private synchronized void addActive(BuffInfo info)
+	private void addActive(BuffInfo info)
 	{
 		final Skill skill = info.getSkill();
 		

L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/actor/instance/PlayerInstance.java

@@ -51,7 +51,6 @@ import org.l2jmobius.commons.util.Rnd;
 import org.l2jmobius.gameserver.GameTimeController;
 import org.l2jmobius.gameserver.ItemsAutoDestroy;
 import org.l2jmobius.gameserver.LoginServerThread;
-import org.l2jmobius.gameserver.RecipeController;
 import org.l2jmobius.gameserver.ai.CreatureAI;
 import org.l2jmobius.gameserver.ai.CtrlIntention;
 import org.l2jmobius.gameserver.ai.PlayerAI;
@@ -115,6 +114,7 @@ import org.l2jmobius.gameserver.instancemanager.MatchingRoomManager;
 import org.l2jmobius.gameserver.instancemanager.MentorManager;
 import org.l2jmobius.gameserver.instancemanager.PunishmentManager;
 import org.l2jmobius.gameserver.instancemanager.QuestManager;
+import org.l2jmobius.gameserver.instancemanager.SellBuffsManager;
 import org.l2jmobius.gameserver.instancemanager.SiegeManager;
 import org.l2jmobius.gameserver.instancemanager.ZoneManager;
 import org.l2jmobius.gameserver.model.AccessLevel;
@@ -593,12 +593,12 @@ public final class PlayerInstance extends Playable
 	/** The Pet of the PlayerInstance */
 	private PetInstance _pet = null;
 	/** Servitors of the PlayerInstance */
-	private volatile Map<Integer, Summon> _servitors = null;
+	private volatile Map<Integer, Summon> _servitors = new ConcurrentHashMap<>(1);
 	/** The Agathion of the PlayerInstance */
 	private int _agathionId = 0;
 	// apparently, a PlayerInstance CAN have both a summon AND a tamed beast at the same time!!
 	// after Freya players can control more than one tamed beast
-	private volatile Set<TamedBeastInstance> _tamedBeast = null;
+	private volatile Set<TamedBeastInstance> _tamedBeast = ConcurrentHashMap.newKeySet();
 	
 	private boolean _minimapAllowed = false;
 	
@@ -670,7 +670,7 @@ public final class PlayerInstance extends Playable
 	private volatile Map<Integer, ExResponseCommissionInfo> _lastCommissionInfos;
 	
 	@SuppressWarnings("rawtypes")
-	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events;
+	private volatile Map<Class<? extends AbstractEvent>, AbstractEvent<?>> _events = new ConcurrentHashMap<>();
 	private boolean _isOnCustomEvent = false;
 	
 	// protects a char from aggro mobs when getting up from fake death
@@ -687,7 +687,7 @@ public final class PlayerInstance extends Playable
 	private int _expertiseWeaponPenalty = 0;
 	private int _expertisePenaltyBonus = 0;
 	
-	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests;
+	private volatile Map<Class<? extends AbstractRequest>, AbstractRequest> _requests = new ConcurrentHashMap<>();
 	
 	protected boolean _inventoryDisable = false;
 	/** Player's cubics. */
@@ -710,7 +710,7 @@ public final class PlayerInstance extends Playable
 	
 	private final BlockList _blockList = new BlockList(this);
 	
-	private volatile Map<Integer, Skill> _transformSkills;
+	private final Map<Integer, Skill> _transformSkills = new ConcurrentHashMap<>();
 	private ScheduledFuture<?> _taskRentPet;
 	private ScheduledFuture<?> _taskWater;
 	
@@ -2005,11 +2005,7 @@ public final class PlayerInstance extends Playable
 	
 	public int getWeightPenalty()
 	{
-		if (_dietMode)
+		return _dietMode ? 0 : _curWeightPenalty;
-		{
-			return 0;
-		}
-		return _curWeightPenalty;
 	}
 	
 	/**
@@ -4264,9 +4260,16 @@ public final class PlayerInstance extends Playable
 			sendPacket(ActionFailed.STATIC_PACKET);
 			
 			if ((targetPlayer.getPrivateStoreType() == PrivateStoreType.SELL) || (targetPlayer.getPrivateStoreType() == PrivateStoreType.PACKAGE_SELL))
+			{
+				if (_isSellingBuffs)
+				{
+					SellBuffsManager.getInstance().sendBuffMenu(this, targetPlayer, 0);
+				}
+				else
 				{
 					sendPacket(new PrivateStoreListSell(this, targetPlayer));
 				}
+			}
 			else if (targetPlayer.getPrivateStoreType() == PrivateStoreType.BUY)
 			{
 				sendPacket(new PrivateStoreListBuy(this, targetPlayer));
@@ -4983,13 +4986,13 @@ public final class PlayerInstance extends Playable
 		{
 			stopFeed();
 		}
-		synchronized (this)
+		// synchronized (this)
-		{
+		// {
 		if (isFakeDeath())
 		{
 			stopFakeDeath(true);
 		}
-		}
+		// }
 		
 		// Unsummon Cubics
 		if (!_cubics.isEmpty())
@@ -5410,7 +5413,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public Map<Integer, Summon> getServitors()
 	{
-		return _servitors == null ? Collections.emptyMap() : _servitors;
+		return _servitors;
 	}
 	
 	public Summon getAnyServitor()
@@ -5461,16 +5464,6 @@ public final class PlayerInstance extends Playable
 	
 	public void addServitor(Summon servitor)
 	{
-		if (_servitors == null)
-		{
-			synchronized (this)
-			{
-				if (_servitors == null)
-				{
-					_servitors = new ConcurrentHashMap<>(1);
-				}
-			}
-		}
 		_servitors.put(servitor.getObjectId(), servitor);
 	}
 	
@@ -5488,16 +5481,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public void addTrainedBeast(TamedBeastInstance tamedBeast)
 	{
-		if (_tamedBeast == null)
-		{
-			synchronized (this)
-			{
-				if (_tamedBeast == null)
-				{
-					_tamedBeast = ConcurrentHashMap.newKeySet();
-				}
-			}
-		}
 		_tamedBeast.add(tamedBeast);
 	}
 	
@@ -10359,14 +10342,11 @@ public final class PlayerInstance extends Playable
 		}
 		
 		// Trained beast is lost after teleport
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.deleteMe();
 		}
 		_tamedBeast.clear();
-		}
 		
 		// Modify the position of the pet if necessary
 		if (_pet != null)
@@ -10466,14 +10446,11 @@ public final class PlayerInstance extends Playable
 		super.reduceCurrentHp(value, attacker, skill, isDOT, directlyToHp, critical, reflect);
 		
 		// notify the tamed beast of attacks
-		if (_tamedBeast != null)
-		{
 		for (TamedBeastInstance tamedBeast : _tamedBeast)
 		{
 			tamedBeast.onOwnerGotAttacked(attacker);
 		}
 	}
-	}
 	
 	public void broadcastSnoop(ChatType type, String name, String _text)
 	{
@@ -10863,16 +10840,6 @@ public final class PlayerInstance extends Playable
 			LOGGER.log(Level.SEVERE, "deleteMe()", e);
 		}
 		
-		// Stop crafting, if in progress
-		try
-		{
-			RecipeController.getInstance().requestMakeItemAbort(this);
-		}
-		catch (Exception e)
-		{
-			LOGGER.log(Level.SEVERE, "deleteMe()", e);
-		}
-		
 		// Cancel Attak or Cast
 		try
 		{
@@ -11584,38 +11551,27 @@ public final class PlayerInstance extends Playable
 	
 	public void addTransformSkill(Skill skill)
 	{
-		if (_transformSkills == null)
-		{
-			synchronized (this)
-			{
-				if (_transformSkills == null)
-				{
-					_transformSkills = new HashMap<>();
-				}
-			}
-		}
 		_transformSkills.put(skill.getId(), skill);
 	}
 	
 	public boolean hasTransformSkill(Skill skill)
 	{
-		return (_transformSkills != null) && (_transformSkills.get(skill.getId()) == skill);
+		return !_transformSkills.isEmpty() && (_transformSkills.get(skill.getId()) == skill);
 	}
 	
 	public boolean hasTransformSkills()
 	{
-		return (_transformSkills != null);
+		return !_transformSkills.isEmpty();
 	}
 	
 	public Collection<Skill> getAllTransformSkills()
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return _transformSkills.values();
-		return transformSkills != null ? transformSkills.values() : Collections.emptyList();
 	}
 	
-	public synchronized void removeAllTransformSkills()
+	public void removeAllTransformSkills()
 	{
-		_transformSkills = null;
+		_transformSkills.clear();
 	}
 	
 	/**
@@ -11625,8 +11581,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public final Skill getKnownSkill(int skillId)
 	{
-		final Map<Integer, Skill> transformSkills = _transformSkills;
+		return !_transformSkills.isEmpty() ? _transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
-		return transformSkills != null ? transformSkills.getOrDefault(skillId, super.getKnownSkill(skillId)) : super.getKnownSkill(skillId);
 	}
 	
 	/**
@@ -11638,8 +11593,7 @@ public final class PlayerInstance extends Playable
 		
 		if (isTransformed())
 		{
-			final Map<Integer, Skill> transformSkills = _transformSkills;
+			if (!_transformSkills.isEmpty())
-			if (transformSkills != null)
 			{
 				// Include transformation skills and those skills that are allowed during transformation.
 				currentSkills = currentSkills.stream().filter(Skill::allowOnTransform).collect(Collectors.toList());
@@ -11672,7 +11626,7 @@ public final class PlayerInstance extends Playable
 					}
 				}
 				// Include transformation skills.
-				currentSkills.addAll(transformSkills.values());
+				currentSkills.addAll(_transformSkills.values());
 			}
 		}
 		
@@ -13085,7 +13039,7 @@ public final class PlayerInstance extends Playable
 	@Override
 	public boolean canRevive()
 	{
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13128,7 +13082,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13147,7 +13101,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13166,7 +13120,7 @@ public final class PlayerInstance extends Playable
 		{
 			return true;
 		}
-		if (_events != null)
+		if (!_events.isEmpty())
 		{
 			for (AbstractEvent<?> listener : _events.values())
 			{
@@ -13534,22 +13488,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean addRequest(AbstractRequest request)
 	{
-		if (_requests == null)
-		{
-			synchronized (this)
-			{
-				if (_requests == null)
-				{
-					_requests = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return canRequest(request) && (_requests.putIfAbsent(request.getClass(), request) == null);
 	}
 	
 	public boolean canRequest(AbstractRequest request)
 	{
-		return (_requests != null) && _requests.values().stream().allMatch(request::canWorkWith);
+		return !_requests.isEmpty() && _requests.values().stream().allMatch(request::canWorkWith);
 	}
 	
 	/**
@@ -13558,7 +13502,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeRequest(Class<? extends AbstractRequest> clazz)
 	{
-		return (_requests != null) && (_requests.remove(clazz) != null);
+		return !_requests.isEmpty() && (_requests.remove(clazz) != null);
 	}
 	
 	/**
@@ -13568,7 +13512,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractRequest> T getRequest(Class<T> requestClass)
 	{
-		return _requests != null ? requestClass.cast(_requests.get(requestClass)) : null;
+		return !_requests.isEmpty() ? requestClass.cast(_requests.get(requestClass)) : null;
 	}
 	
 	/**
@@ -13576,12 +13520,12 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean hasRequests()
 	{
-		return (_requests != null) && !_requests.isEmpty();
+		return !_requests.isEmpty();
 	}
 	
 	public boolean hasItemRequest()
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(AbstractRequest::isItemRequest);
 	}
 	
 	/**
@@ -13592,7 +13536,7 @@ public final class PlayerInstance extends Playable
 	@SafeVarargs
 	public final boolean hasRequest(Class<? extends AbstractRequest> requestClass, Class<? extends AbstractRequest>... classes)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			for (Class<? extends AbstractRequest> clazz : classes)
 			{
@@ -13612,7 +13556,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isProcessingItem(int objectId)
 	{
-		return (_requests != null) && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
+		return !_requests.isEmpty() && _requests.values().stream().anyMatch(req -> req.isUsing(objectId));
 	}
 	
 	/**
@@ -13621,7 +13565,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public void removeRequestsThatProcessesItem(int objectId)
 	{
-		if (_requests != null)
+		if (!_requests.isEmpty())
 		{
 			_requests.values().removeIf(req -> req.isUsing(objectId));
 		}
@@ -13653,16 +13597,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public Map<Integer, ExResponseCommissionInfo> getLastCommissionInfos()
 	{
-		if (_lastCommissionInfos == null)
-		{
-			synchronized (this)
-			{
-				if (_lastCommissionInfos == null)
-				{
-					_lastCommissionInfos = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _lastCommissionInfos;
 	}
 	
@@ -13752,16 +13686,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean registerOnEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
-		{
-			synchronized (this)
-			{
-				if (_events == null)
-				{
-					_events = new ConcurrentHashMap<>();
-				}
-			}
-		}
 		return _events.putIfAbsent(event.getClass(), event) == null;
 	}
 	
@@ -13771,7 +13695,7 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean removeFromEvent(AbstractEvent<?> event)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return false;
 		}
@@ -13785,11 +13709,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public <T extends AbstractEvent<?>> T getEvent(Class<T> clazz)
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().filter(event -> clazz.isAssignableFrom(event.getClass())).map(clazz::cast).findFirst().orElse(null);
 	}
 	
@@ -13798,11 +13721,10 @@ public final class PlayerInstance extends Playable
 	 */
 	public AbstractEvent<?> getEvent()
 	{
-		if (_events == null)
+		if (_events.isEmpty())
 		{
 			return null;
 		}
-		
 		return _events.values().stream().findFirst().orElse(null);
 	}
 	
@@ -13812,11 +13734,6 @@ public final class PlayerInstance extends Playable
 	 */
 	public boolean isOnEvent(Class<? extends AbstractEvent<?>> clazz)
 	{
-		if (_events == null)
-		{
-			return false;
-		}
-		
 		return _events.containsKey(clazz);
 	}
 	

L2J_Mobius_Classic_2.4_SecretOfEmpire/java/org/l2jmobius/gameserver/model/actor/instance/TamedBeastInstance.java

@@ -178,7 +178,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		}
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}
@@ -311,7 +311,7 @@ public final class TamedBeastInstance extends FeedableBeastInstance
 		stopHpMpRegeneration();
 		
 		// clean up variables
-		if ((_owner != null) && (_owner.getTrainedBeasts() != null))
+		if (_owner != null)
 		{
 			_owner.getTrainedBeasts().remove(this);
 		}