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

Example 76 with ThreadMXBean

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

the class DeployedJarJUnitTest method testMultiThreadingDoesNotCauseDeadlock.

@Test
public void testMultiThreadingDoesNotCauseDeadlock() throws Exception {
    // Add two JARs to the classpath
    byte[] jarBytes = this.classBuilder.createJarFromName("JarClassLoaderJUnitA");
    ClassPathLoader.getLatest().getJarDeployer().deploy("JarClassLoaderJUnitA.jar", jarBytes);
    jarBytes = this.classBuilder.createJarFromClassContent("com/jcljunit/JarClassLoaderJUnitB", "package com.jcljunit; public class JarClassLoaderJUnitB {}");
    ClassPathLoader.getLatest().getJarDeployer().deploy("JarClassLoaderJUnitB.jar", jarBytes);
    String[] classNames = new String[] { "JarClassLoaderJUnitA", "com.jcljunit.JarClassLoaderJUnitB", "NON-EXISTENT CLASS" };
    final int threadCount = 10;
    ExecutorService executorService = Executors.newFixedThreadPool(threadCount);
    for (int i = 0; i < threadCount; i++) {
        executorService.submit(new ForNameExerciser(classNames));
    }
    executorService.shutdown();
    Awaitility.await().atMost(60, TimeUnit.SECONDS).until(executorService::isTerminated);
    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
    long[] threadIds = threadMXBean.findDeadlockedThreads();
    if (threadIds != null) {
        StringBuilder deadLockTrace = new StringBuilder();
        for (long threadId : threadIds) {
            ThreadInfo threadInfo = threadMXBean.getThreadInfo(threadId, 100);
            deadLockTrace.append(threadInfo.getThreadName()).append("\n");
            for (StackTraceElement stackTraceElem : threadInfo.getStackTrace()) {
                deadLockTrace.append("\t").append(stackTraceElem).append("\n");
            }
        }
        System.out.println(deadLockTrace);
    }
    assertThat(threadIds).isNull();
}

Example 77 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project gerrit by GerritCodeReview.

the class GetSummary method getThreadSummary.

private ThreadSummaryInfo getThreadSummary() {
    Runtime r = Runtime.getRuntime();
    ThreadSummaryInfo threadInfo = new ThreadSummaryInfo();
    threadInfo.cpus = r.availableProcessors();
    threadInfo.threads = toInteger(ManagementFactory.getThreadMXBean().getThreadCount());
    List<String> prefixes = Arrays.asList("H2", "HTTP", "IntraLineDiff", "ReceiveCommits", "SSH git-receive-pack", "SSH git-upload-pack", "SSH-Interactive-Worker", "SSH-Stream-Worker", "SshCommandStart", "sshd-SshServer");
    String other = "Other";
    ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
    threadInfo.counts = new HashMap<>();
    for (long id : threadMXBean.getAllThreadIds()) {
        ThreadInfo info = threadMXBean.getThreadInfo(id);
        if (info == null) {
            continue;
        }
        String name = info.getThreadName();
        Thread.State state = info.getThreadState();
        String group = other;
        for (String p : prefixes) {
            if (name.startsWith(p)) {
                group = p;
                break;
            }
        }
        Map<Thread.State, Integer> counts = threadInfo.counts.get(group);
        if (counts == null) {
            counts = new HashMap<>();
            threadInfo.counts.put(group, counts);
        }
        Integer c = counts.get(state);
        counts.put(state, c != null ? c + 1 : 1);
    }
    return threadInfo;
}

Example 78 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project symmetric-ds by JumpMind.

the class MonitorTypeCpu method getNotificationMessage.

protected String getNotificationMessage(long value, long threshold, long period) {
    ThreadInfo[] infos = new ThreadInfo[TOP_THREADS];
    long[] cpuUsages = new long[TOP_THREADS];
    ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    for (long threadId : threadBean.getAllThreadIds()) {
        ThreadInfo info = threadBean.getThreadInfo(threadId);
        if (info.getThreadState() != Thread.State.TERMINATED) {
            rankTopUsage(infos, cpuUsages, info, threadBean.getThreadCpuTime(threadId));
        }
    }
    String text = "CPU usage is at " + value;
    for (int i = 0; i < infos.length; i++) {
        text += "Top #" + (i + 1) + " CPU thread " + infos[i].getThreadId() + " is using " + (cpuUsages[i] / 1000000000f) + "s";
        text += logStackTrace(threadBean.getThreadInfo(infos[i].getThreadId(), MAX_STACK_DEPTH));
    }
    return text;
}

Example 79 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project symmetric-ds by JumpMind.

the class MonitorTypeMemory method getMessage.

public String getMessage(long value, long threshold, long period) {
    long maxMemory = tenuredPool.getUsage().getMax();
    long usedMemory = tenuredPool.getUsage().getUsed();
    String text = "Memory threshold exceeded, " + usedMemory + " of " + maxMemory;
    ThreadInfo[] infos = new ThreadInfo[TOP_THREADS];
    long[] byteUsages = new long[TOP_THREADS];
    ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    for (long threadId : threadBean.getAllThreadIds()) {
        ThreadInfo info = threadBean.getThreadInfo(threadId);
        if (info.getThreadState() != Thread.State.TERMINATED) {
            rankTopUsage(infos, byteUsages, info, getThreadAllocatedBytes(threadBean, threadId));
        }
    }
    for (int i = 0; i < infos.length; i++) {
        text += "Top #" + (i + 1) + " memory thread " + infos[i].getThreadId() + " is using " + String.format("%.1f", ((double) byteUsages[i] / 1048576f)) + "MB";
        text += logStackTrace(threadBean.getThreadInfo(infos[i].getThreadId(), MAX_STACK_DEPTH));
    }
    return text;
}

Example 80 with ThreadMXBean

use of java.lang.management.ThreadMXBean in project symmetric-ds by JumpMind.

the class ProcessInfo method getThreadData.

public static ThreadData getThreadData(long threadId) {
    ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();
    ThreadInfo info = threadBean.getThreadInfo(threadId, 100);
    if (info != null) {
        String threadName = info.getThreadName();
        return new ThreadData(threadName, AppUtils.formatStackTrace(info.getStackTrace()));
    } else {
        return null;
    }
}