125 lines
3.6 KiB
Java
125 lines
3.6 KiB
Java
/*
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* Copyright (C) 2004-2015 L2J Server
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*
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* This file is part of L2J Server.
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*
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* L2J Server is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* L2J Server is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jserver.util;
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import java.lang.management.LockInfo;
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import java.lang.management.ManagementFactory;
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import java.lang.management.MonitorInfo;
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import java.lang.management.ThreadInfo;
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import java.lang.management.ThreadMXBean;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import com.l2jserver.Config;
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import com.l2jserver.gameserver.Shutdown;
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import com.l2jserver.gameserver.util.Broadcast;
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/**
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* Thread to check for deadlocked threads.
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* @author -Nemesiss- L2M
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*/
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public class DeadLockDetector extends Thread
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{
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private static Logger _log = Logger.getLogger(DeadLockDetector.class.getName());
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/** Interval to check for deadlocked threads */
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private static final int _sleepTime = Config.DEADLOCK_CHECK_INTERVAL * 1000;
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private final ThreadMXBean tmx;
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public DeadLockDetector()
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{
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super("DeadLockDetector");
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tmx = ManagementFactory.getThreadMXBean();
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}
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@Override
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public final void run()
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{
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boolean deadlock = false;
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while (!deadlock)
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{
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try
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{
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long[] ids = tmx.findDeadlockedThreads();
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if (ids != null)
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{
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deadlock = true;
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ThreadInfo[] tis = tmx.getThreadInfo(ids, true, true);
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StringBuilder info = new StringBuilder();
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info.append("DeadLock Found!");
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info.append(Config.EOL);
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for (ThreadInfo ti : tis)
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{
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info.append(ti.toString());
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}
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for (ThreadInfo ti : tis)
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{
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LockInfo[] locks = ti.getLockedSynchronizers();
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MonitorInfo[] monitors = ti.getLockedMonitors();
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if ((locks.length == 0) && (monitors.length == 0))
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{
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continue;
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}
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ThreadInfo dl = ti;
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info.append("Java-level deadlock:");
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info.append(Config.EOL);
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info.append('\t');
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info.append(dl.getThreadName());
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info.append(" is waiting to lock ");
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info.append(dl.getLockInfo().toString());
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info.append(" which is held by ");
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info.append(dl.getLockOwnerName());
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info.append(Config.EOL);
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while ((dl = tmx.getThreadInfo(new long[]
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{
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dl.getLockOwnerId()
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}, true, true)[0]).getThreadId() != ti.getThreadId())
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{
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info.append('\t');
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info.append(dl.getThreadName());
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info.append(" is waiting to lock ");
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info.append(dl.getLockInfo().toString());
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info.append(" which is held by ");
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info.append(dl.getLockOwnerName());
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info.append(Config.EOL);
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}
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}
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_log.warning(info.toString());
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if (Config.RESTART_ON_DEADLOCK)
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{
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Broadcast.toAllOnlinePlayers("Server has stability issues - restarting now.");
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Shutdown.getInstance().startTelnetShutdown("DeadLockDetector - Auto Restart", 60, true);
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}
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}
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Thread.sleep(_sleepTime);
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}
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catch (Exception e)
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{
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_log.log(Level.WARNING, "DeadLockDetector: ", e);
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}
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}
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}
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}
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