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

Example 1 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project flink by apache.

the class TaskExecutorMetricsInitializer method instantiateThreadMetrics.

private static void instantiateThreadMetrics(MetricGroup metrics) {
    final ThreadMXBean mxBean = ManagementFactory.getThreadMXBean();
    metrics.<Integer, Gauge<Integer>>gauge("Count", new Gauge<Integer>() {

        @Override
        public Integer getValue() {
            return mxBean.getThreadCount();
        }
    });
}

Example 2 with ThreadMXBean

use of java.lang.management.ThreadMXBean 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 3 with ThreadMXBean

use of java.lang.management.ThreadMXBean 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 4 with ThreadMXBean

use of java.lang.management.ThreadMXBean 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()));
        }
    }
}

Example 5 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project hbase 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;
    }
}