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[WFCORE-5968] log thread dump upon management timeout
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controller/src/main/java/org/jboss/as/controller/ThreadDumpUtil.java
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/* | ||
* JBoss, Home of Professional Open Source. | ||
* Copyright 2011, Red Hat, Inc., and individual contributors | ||
* as indicated by the @author tags. See the copyright.txt file in the | ||
* distribution for a full listing of individual contributors. | ||
* | ||
* This is free software; you can redistribute it and/or modify it | ||
* under the terms of the GNU Lesser General Public License as | ||
* published by the Free Software Foundation; either version 2.1 of | ||
* the License, or (at your option) any later version. | ||
* | ||
* This software is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
* Lesser General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU Lesser General Public | ||
* License along with this software; if not, write to the Free | ||
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | ||
* 02110-1301 USA, or see the FSF site: http://www.fsf.org. | ||
*/ | ||
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package org.jboss.as.controller; | ||
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import org.jboss.as.controller.logging.ControllerLogger; | ||
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import java.io.PrintWriter; | ||
import java.io.StringWriter; | ||
import java.lang.management.LockInfo; | ||
import java.lang.management.ManagementFactory; | ||
import java.lang.management.MonitorInfo; | ||
import java.lang.management.ThreadInfo; | ||
import java.lang.management.ThreadMXBean; | ||
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final class ThreadDumpUtil { | ||
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public static void threadDump() { | ||
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try ( | ||
StringWriter dumpstr = new StringWriter(); | ||
PrintWriter dumpout = new PrintWriter(dumpstr); | ||
StringWriter deadlockstr = new StringWriter(); | ||
PrintWriter deadlockout = new PrintWriter(deadlockstr); | ||
) { | ||
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ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); | ||
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for (ThreadInfo threadInfo : threadMXBean.dumpAllThreads(true, true)) { | ||
dumpout.println(threadInfoToString(threadInfo)); | ||
} | ||
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ControllerLogger.MGMT_OP_LOGGER.threadDump(dumpstr.toString()); | ||
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long[] deadlockedThreads = threadMXBean.findDeadlockedThreads(); | ||
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if (deadlockedThreads != null && deadlockedThreads.length > 0) { | ||
for (ThreadInfo threadInfo : threadMXBean.getThreadInfo(deadlockedThreads, true, true)) { | ||
deadlockout.println(threadInfoToString(threadInfo)); | ||
} | ||
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ControllerLogger.MGMT_OP_LOGGER.deadLock(deadlockstr.toString()); | ||
} | ||
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} catch (Exception e) { | ||
ControllerLogger.ROOT_LOGGER.threadDumpException(e); | ||
} | ||
} | ||
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private static String threadInfoToString(ThreadInfo threadInfo) { | ||
StringBuilder sb = new StringBuilder("\"" + threadInfo.getThreadName() + "\"" + | ||
" Id=" + threadInfo.getThreadId() + " " + | ||
threadInfo.getThreadState()); | ||
if (threadInfo.getLockName() != null) { | ||
sb.append(" on " + threadInfo.getLockName()); | ||
} | ||
if (threadInfo.getLockOwnerName() != null) { | ||
sb.append(" owned by \"" + threadInfo.getLockOwnerName() + | ||
"\" Id=" + threadInfo.getLockOwnerId()); | ||
} | ||
if (threadInfo.isSuspended()) { | ||
sb.append(" (suspended)"); | ||
} | ||
if (threadInfo.isInNative()) { | ||
sb.append(" (in native)"); | ||
} | ||
sb.append('\n'); | ||
int i = 0; | ||
for (; i < threadInfo.getStackTrace().length; i++) { | ||
StackTraceElement ste = threadInfo.getStackTrace()[i]; | ||
sb.append("\tat " + ste.toString()); | ||
sb.append('\n'); | ||
if (i == 0 && threadInfo.getLockInfo() != null) { | ||
Thread.State ts = threadInfo.getThreadState(); | ||
switch (ts) { | ||
case BLOCKED: | ||
sb.append("\t- blocked on " + threadInfo.getLockInfo()); | ||
sb.append('\n'); | ||
break; | ||
case WAITING: | ||
sb.append("\t- waiting on " + threadInfo.getLockInfo()); | ||
sb.append('\n'); | ||
break; | ||
case TIMED_WAITING: | ||
sb.append("\t- waiting on " + threadInfo.getLockInfo()); | ||
sb.append('\n'); | ||
break; | ||
default: | ||
} | ||
} | ||
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for (MonitorInfo mi : threadInfo.getLockedMonitors()) { | ||
if (mi.getLockedStackDepth() == i) { | ||
sb.append("\t- locked " + mi); | ||
sb.append('\n'); | ||
} | ||
} | ||
} | ||
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LockInfo[] locks = threadInfo.getLockedSynchronizers(); | ||
if (locks.length > 0) { | ||
sb.append("\n\tNumber of locked synchronizers = " + locks.length); | ||
sb.append('\n'); | ||
for (LockInfo li : locks) { | ||
sb.append("\t- " + li); | ||
sb.append('\n'); | ||
} | ||
} | ||
sb.append('\n'); | ||
return sb.toString(); | ||
} | ||
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} |
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