Examples of java.lang.management.ThreadMXBean.findDeadlockedThreads()

java.lang.management.ThreadMXBean.findDeadlockedThreads()
Finds cycles of threads that are in deadlock waiting to acquire object monitors or ownable synchronizers. Threads are deadlocked in a cycle waiting for a lock of these two types if each thread owns one lock while trying to acquire another lock already held by another thread in the cycle.
This method is designed for troubleshooting use, but not for synchronization control. It might be an expensive operation. @return an array of IDs of the threads that are deadlocked waiting for object monitors or ownable synchronizers, if any; null otherwise. @throws java.lang.SecurityException if a security managerexists and the caller does not have ManagementPermission("monitor"). @throws java.lang.UnsupportedOperationException if the Java virtual machine does not support monitoriing of ownable synchronizer usage. @see #isSynchronizerUsageSupported @see #findMonitorDeadlockedThreads @since 1.6

    }


    public static ThreadInfo[] findDeadlockedThreads() {
        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
        if (threadMXBean.isSynchronizerUsageSupported()) {
            long[] deadlockedThreads = threadMXBean.findDeadlockedThreads();
            if (deadlockedThreads == null || deadlockedThreads.length == 0) {
                return null;
            }
            return threadMXBean.getThreadInfo(deadlockedThreads, true, true);
        } else {

View Full Code Here


    private Element getThreadStats() {
        Element threads = new Element("threads");
        ThreadMXBean mxBean = ManagementFactory.getThreadMXBean();
        int threadCount = mxBean.getThreadCount();
        long[] deadlocked = mxBean.findDeadlockedThreads();
        long startedCount = mxBean.getTotalStartedThreadCount();
        int deadCount = deadlocked != null ? deadlocked.length : 0;
        int peakCount = mxBean.getPeakThreadCount();
        long totalCount = mxBean.getTotalStartedThreadCount();
        Element threadCountElem = new Element("threadCount");

View Full Code Here

    public static String dumpThreads() {
        StringBuilder sb=new StringBuilder();
        ThreadMXBean bean=ManagementFactory.getThreadMXBean();
        long[] ids=bean.getAllThreadIds();
        _printThreads(bean,ids,sb);
        long[] deadlocks=bean.findDeadlockedThreads();
        if(deadlocks != null && deadlocks.length > 0) {
            sb.append("deadlocked threads:\n");
            _printThreads(bean,deadlocks,sb);
        }

View Full Code Here

    }


    @Override
    public long[] findDeadlockedThreads() {
        ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
        return threadMXBean.findDeadlockedThreads();
    }


    @Override
    public boolean isEnabled() {
        return true;

View Full Code Here

    for (long tid : threadIds) {
      writer.append(tid).append(" ");
    }
    writer.append("\n");


    long[] deadLockTids = threadMXBean.findDeadlockedThreads();
    if (deadLockTids != null) {
      writer.append(threadIds.length + " deadlocked threads:");
      for (long tid : deadLockTids) {
        writer.append(tid).append(" ");
      }

View Full Code Here

0 1 2

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.