Examples with ThreadInfo java.lang.management.ThreadInfo used on opensource projects

Example 1 with ThreadInfo

use of java.lang.management.ThreadInfo in project hadoop by apache.

the class ReflectionUtils method printThreadInfo.

/**
   * Print all of the thread's information and stack traces.
   * 
   * @param stream the stream to
   * @param title a string title for the stack trace
   */
public static synchronized void printThreadInfo(PrintStream stream, String title) {
    final int STACK_DEPTH = 20;
    boolean contention = threadBean.isThreadContentionMonitoringEnabled();
    long[] threadIds = threadBean.getAllThreadIds();
    stream.println("Process Thread Dump: " + title);
    stream.println(threadIds.length + " active threads");
    for (long tid : threadIds) {
        ThreadInfo info = threadBean.getThreadInfo(tid, STACK_DEPTH);
        if (info == null) {
            stream.println("  Inactive");
            continue;
        }
        stream.println("Thread " + getTaskName(info.getThreadId(), info.getThreadName()) + ":");
        Thread.State state = info.getThreadState();
        stream.println("  State: " + state);
        stream.println("  Blocked count: " + info.getBlockedCount());
        stream.println("  Waited count: " + info.getWaitedCount());
        if (contention) {
            stream.println("  Blocked time: " + info.getBlockedTime());
            stream.println("  Waited time: " + info.getWaitedTime());
        }
        if (state == Thread.State.WAITING) {
            stream.println("  Waiting on " + info.getLockName());
        } else if (state == Thread.State.BLOCKED) {
            stream.println("  Blocked on " + info.getLockName());
            stream.println("  Blocked by " + getTaskName(info.getLockOwnerId(), info.getLockOwnerName()));
        }
        stream.println("  Stack:");
        for (StackTraceElement frame : info.getStackTrace()) {
            stream.println("    " + frame.toString());
        }
    }
    stream.flush();
}

Example 2 with ThreadInfo

use of java.lang.management.ThreadInfo in project hadoop by apache.

the class JvmMetrics method getThreadUsage.

private void getThreadUsage(MetricsRecordBuilder rb) {
    int threadsNew = 0;
    int threadsRunnable = 0;
    int threadsBlocked = 0;
    int threadsWaiting = 0;
    int threadsTimedWaiting = 0;
    int threadsTerminated = 0;
    long[] threadIds = threadMXBean.getAllThreadIds();
    for (ThreadInfo threadInfo : threadMXBean.getThreadInfo(threadIds, 0)) {
        // race protection
        if (threadInfo == null)
            continue;
        switch(threadInfo.getThreadState()) {
            case NEW:
                threadsNew++;
                break;
            case RUNNABLE:
                threadsRunnable++;
                break;
            case BLOCKED:
                threadsBlocked++;
                break;
            case WAITING:
                threadsWaiting++;
                break;
            case TIMED_WAITING:
                threadsTimedWaiting++;
                break;
            case TERMINATED:
                threadsTerminated++;
                break;
        }
    }
    rb.addGauge(ThreadsNew, threadsNew).addGauge(ThreadsRunnable, threadsRunnable).addGauge(ThreadsBlocked, threadsBlocked).addGauge(ThreadsWaiting, threadsWaiting).addGauge(ThreadsTimedWaiting, threadsTimedWaiting).addGauge(ThreadsTerminated, threadsTerminated);
}

Example 3 with ThreadInfo

use of java.lang.management.ThreadInfo in project hadoop by apache.

the class TimedOutTestsListener method buildDeadlockInfo.

static String buildDeadlockInfo() {
    ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    long[] threadIds = threadBean.findMonitorDeadlockedThreads();
    if (threadIds != null && threadIds.length > 0) {
        StringWriter stringWriter = new StringWriter();
        PrintWriter out = new PrintWriter(stringWriter);
        ThreadInfo[] infos = threadBean.getThreadInfo(threadIds, true, true);
        for (ThreadInfo ti : infos) {
            printThreadInfo(ti, out);
            printLockInfo(ti.getLockedSynchronizers(), out);
            out.println();
        }
        out.close();
        return stringWriter.toString();
    } else {
        return null;
    }
}

Example 4 with ThreadInfo

use of java.lang.management.ThreadInfo in project hadoop by apache.

the class GenericTestUtils method anyThreadMatching.

/**
   * Determine if there are any threads whose name matches the regex.
   * @param pattern a Pattern object used to match thread names
   * @return true if there is any thread that matches the pattern
   */
public static boolean anyThreadMatching(Pattern pattern) {
    ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    ThreadInfo[] infos = threadBean.getThreadInfo(threadBean.getAllThreadIds(), 20);
    for (ThreadInfo info : infos) {
        if (info == null)
            continue;
        if (pattern.matcher(info.getThreadName()).matches()) {
            return true;
        }
    }
    return false;
}

Example 5 with ThreadInfo

use of java.lang.management.ThreadInfo in project hbase by apache.

the class GenericTestUtils method assertNoThreadsMatching.

/**
   * Assert that there are no threads running whose name matches the
   * given regular expression.
   * @param regex the regex to match against
   */
public static void assertNoThreadsMatching(String regex) {
    Pattern pattern = Pattern.compile(regex);
    ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    ThreadInfo[] infos = threadBean.getThreadInfo(threadBean.getAllThreadIds(), 20);
    for (ThreadInfo info : infos) {
        if (info == null)
            continue;
        if (pattern.matcher(info.getThreadName()).matches()) {
            Assert.fail("Leaked thread: " + info + "\n" + Joiner.on("\n").join(info.getStackTrace()));
        }
    }
}