Beispiel #1
0
 // Return thread IDs of deadlocked threads or null if any.
 // It finds deadlocks involving only monitors if it's a Tiger VM.
 // Otherwise, it finds deadlocks involving both monitors and
 // the concurrent locks.
 public long[] findDeadlockedThreads() throws IOException {
   ThreadMXBean tm = getThreadMXBean();
   if (supportsLockUsage && tm.isSynchronizerUsageSupported()) {
     return tm.findDeadlockedThreads();
   } else {
     return tm.findMonitorDeadlockedThreads();
   }
 }
 private long[] findDeadlockedThreads(ThreadMXBean mbean) {
   // JDK 1.5 only supports the findMonitorDeadlockedThreads()
   // method, so you need to comment out the following three lines
   if (mbean.isSynchronizerUsageSupported()) {
     return mbean.findDeadlockedThreads();
   }
   return mbean.findMonitorDeadlockedThreads();
 }
Beispiel #3
0
 @IgnoreJRERequirement
 public static ThreadInfo[] getThreadInfos() {
   ThreadMXBean mbean = ManagementFactory.getThreadMXBean();
   return mbean.getThreadInfo(
       mbean.getAllThreadIds(),
       mbean.isObjectMonitorUsageSupported(),
       mbean.isSynchronizerUsageSupported());
 }
Beispiel #4
0
 public static String threadDump() {
   StringBuilder threadDump = new StringBuilder();
   ThreadMXBean threadMx = ManagementFactory.getThreadMXBean();
   if (threadMx.isObjectMonitorUsageSupported() && threadMx.isSynchronizerUsageSupported()) {
     // Print lock info if, and only if, both object monitor usage and synchronizer usage are
     // supported.
     dumpThreadInfo(threadDump, true, threadMx);
   } else {
     dumpThreadInfo(threadDump, false, threadMx);
   }
   return threadDump.toString();
 }
  public static void main(String[] argv) throws Exception {
    mbean = newPlatformMXBeanProxy(server, THREAD_MXBEAN_NAME, ThreadMXBean.class);

    if (!mbean.isSynchronizerUsageSupported()) {
      System.out.println("Monitoring of synchronizer usage not supported");
      return;
    }

    thread.setDaemon(true);
    thread.start();

    // wait until myThread acquires mutex and lock owner is set.
    while (!(mutex.isLocked() && mutex.getLockOwner() == thread)) {
      try {
        Thread.sleep(100);
      } catch (InterruptedException e) {
        throw new RuntimeException(e);
      }
    }

    long[] ids = new long[] {thread.getId()};

    // validate the local access
    ThreadInfo[] infos = getThreadMXBean().getThreadInfo(ids, true, true);
    if (infos.length != 1) {
      throw new RuntimeException(
          "Returned ThreadInfo[] of length=" + infos.length + ". Expected to be 1.");
    }
    thread.checkThreadInfo(infos[0]);

    // validate the remote access
    infos = mbean.getThreadInfo(ids, true, true);
    if (infos.length != 1) {
      throw new RuntimeException(
          "Returned ThreadInfo[] of length=" + infos.length + ". Expected to be 1.");
    }
    thread.checkThreadInfo(infos[0]);

    boolean found = false;
    infos = mbean.dumpAllThreads(true, true);
    for (ThreadInfo ti : infos) {
      if (ti.getThreadId() == thread.getId()) {
        thread.checkThreadInfo(ti);
        found = true;
      }
    }

    if (!found) {
      throw new RuntimeException("No ThreadInfo found for MyThread");
    }

    System.out.println("Test passed");
  }
  /* (non-Javadoc)
   * @see org.epics.pvaccess.server.plugins.BeaconServerStatusProvider#getServerStatusData()
   */
  public PVField getServerStatusData() {

    status
        .getIntField("connections")
        .put(context.getTransportRegistry().numberOfActiveTransports());
    status.getLongField("allocatedMemory").put(Runtime.getRuntime().totalMemory());
    status.getLongField("freeMemory").put(Runtime.getRuntime().freeMemory());

    ThreadMXBean threadMBean = ManagementFactory.getThreadMXBean();
    status.getIntField("threads").put(threadMBean.getThreadCount());

    final long[] deadlocks =
        threadMBean.isSynchronizerUsageSupported()
            ? threadMBean.findDeadlockedThreads()
            : threadMBean.findMonitorDeadlockedThreads();
    status.getIntField("deadlocks").put((deadlocks != null) ? deadlocks.length : 0);

    OperatingSystemMXBean osMBean = ManagementFactory.getOperatingSystemMXBean();
    status.getDoubleField("averageSystemLoad").put(osMBean.getSystemLoadAverage());

    return status;
  }
Beispiel #7
0
  /**
   * Retrieve a JVM information text formatted using the given StringManager.
   *
   * @param requestedSm the StringManager to use
   * @return the formatted JVM information text
   */
  private static String getVMInfo(StringManager requestedSm) {
    StringBuilder sb = new StringBuilder();

    synchronized (timeformat) {
      sb.append(timeformat.format(new Date()));
    }
    sb.append(CRLF);

    sb.append(requestedSm.getString("diagnostics.vmInfoRuntime"));
    sb.append(":" + CRLF);
    sb.append(INDENT1 + "vmName: " + runtimeMXBean.getVmName() + CRLF);
    sb.append(INDENT1 + "vmVersion: " + runtimeMXBean.getVmVersion() + CRLF);
    sb.append(INDENT1 + "vmVendor: " + runtimeMXBean.getVmVendor() + CRLF);
    sb.append(INDENT1 + "specName: " + runtimeMXBean.getSpecName() + CRLF);
    sb.append(INDENT1 + "specVersion: " + runtimeMXBean.getSpecVersion() + CRLF);
    sb.append(INDENT1 + "specVendor: " + runtimeMXBean.getSpecVendor() + CRLF);
    sb.append(
        INDENT1 + "managementSpecVersion: " + runtimeMXBean.getManagementSpecVersion() + CRLF);
    sb.append(INDENT1 + "name: " + runtimeMXBean.getName() + CRLF);
    sb.append(INDENT1 + "startTime: " + runtimeMXBean.getStartTime() + CRLF);
    sb.append(INDENT1 + "uptime: " + runtimeMXBean.getUptime() + CRLF);
    sb.append(
        INDENT1 + "isBootClassPathSupported: " + runtimeMXBean.isBootClassPathSupported() + CRLF);
    sb.append(CRLF);

    sb.append(requestedSm.getString("diagnostics.vmInfoOs"));
    sb.append(":" + CRLF);
    sb.append(INDENT1 + "name: " + operatingSystemMXBean.getName() + CRLF);
    sb.append(INDENT1 + "version: " + operatingSystemMXBean.getVersion() + CRLF);
    sb.append(INDENT1 + "architecture: " + operatingSystemMXBean.getArch() + CRLF);
    sb.append(
        INDENT1 + "availableProcessors: " + operatingSystemMXBean.getAvailableProcessors() + CRLF);
    sb.append(
        INDENT1 + "systemLoadAverage: " + operatingSystemMXBean.getSystemLoadAverage() + CRLF);
    sb.append(CRLF);

    sb.append(requestedSm.getString("diagnostics.vmInfoThreadMxBean"));
    sb.append(":" + CRLF);
    sb.append(
        INDENT1
            + "isCurrentThreadCpuTimeSupported: "
            + threadMXBean.isCurrentThreadCpuTimeSupported()
            + CRLF);
    sb.append(
        INDENT1 + "isThreadCpuTimeSupported: " + threadMXBean.isThreadCpuTimeSupported() + CRLF);
    sb.append(INDENT1 + "isThreadCpuTimeEnabled: " + threadMXBean.isThreadCpuTimeEnabled() + CRLF);
    sb.append(
        INDENT1
            + "isObjectMonitorUsageSupported: "
            + threadMXBean.isObjectMonitorUsageSupported()
            + CRLF);
    sb.append(
        INDENT1
            + "isSynchronizerUsageSupported: "
            + threadMXBean.isSynchronizerUsageSupported()
            + CRLF);
    sb.append(
        INDENT1
            + "isThreadContentionMonitoringSupported: "
            + threadMXBean.isThreadContentionMonitoringSupported()
            + CRLF);
    sb.append(
        INDENT1
            + "isThreadContentionMonitoringEnabled: "
            + threadMXBean.isThreadContentionMonitoringEnabled()
            + CRLF);
    sb.append(CRLF);

    sb.append(requestedSm.getString("diagnostics.vmInfoThreadCounts"));
    sb.append(":" + CRLF);
    sb.append(INDENT1 + "daemon: " + threadMXBean.getDaemonThreadCount() + CRLF);
    sb.append(INDENT1 + "total: " + threadMXBean.getThreadCount() + CRLF);
    sb.append(INDENT1 + "peak: " + threadMXBean.getPeakThreadCount() + CRLF);
    sb.append(INDENT1 + "totalStarted: " + threadMXBean.getTotalStartedThreadCount() + CRLF);
    sb.append(CRLF);

    sb.append(requestedSm.getString("diagnostics.vmInfoStartup"));
    sb.append(":" + CRLF);
    for (String arg : runtimeMXBean.getInputArguments()) {
      sb.append(INDENT1 + arg + CRLF);
    }
    sb.append(CRLF);

    sb.append(requestedSm.getString("diagnostics.vmInfoPath"));
    sb.append(":" + CRLF);
    sb.append(INDENT1 + "bootClassPath: " + runtimeMXBean.getBootClassPath() + CRLF);
    sb.append(INDENT1 + "classPath: " + runtimeMXBean.getClassPath() + CRLF);
    sb.append(INDENT1 + "libraryPath: " + runtimeMXBean.getLibraryPath() + CRLF);
    sb.append(CRLF);

    sb.append(requestedSm.getString("diagnostics.vmInfoClassLoading"));
    sb.append(":" + CRLF);
    sb.append(INDENT1 + "loaded: " + classLoadingMXBean.getLoadedClassCount() + CRLF);
    sb.append(INDENT1 + "unloaded: " + classLoadingMXBean.getUnloadedClassCount() + CRLF);
    sb.append(INDENT1 + "totalLoaded: " + classLoadingMXBean.getTotalLoadedClassCount() + CRLF);
    sb.append(INDENT1 + "isVerbose: " + classLoadingMXBean.isVerbose() + CRLF);
    sb.append(CRLF);

    sb.append(requestedSm.getString("diagnostics.vmInfoClassCompilation"));
    sb.append(":" + CRLF);
    sb.append(INDENT1 + "name: " + compilationMXBean.getName() + CRLF);
    sb.append(
        INDENT1 + "totalCompilationTime: " + compilationMXBean.getTotalCompilationTime() + CRLF);
    sb.append(
        INDENT1
            + "isCompilationTimeMonitoringSupported: "
            + compilationMXBean.isCompilationTimeMonitoringSupported()
            + CRLF);
    sb.append(CRLF);

    for (MemoryManagerMXBean mbean : memoryManagerMXBeans) {
      sb.append(requestedSm.getString("diagnostics.vmInfoMemoryManagers", mbean.getName()));
      sb.append(":" + CRLF);
      sb.append(INDENT1 + "isValid: " + mbean.isValid() + CRLF);
      sb.append(INDENT1 + "mbean.getMemoryPoolNames: " + CRLF);
      String[] names = mbean.getMemoryPoolNames();
      Arrays.sort(names);
      for (String name : names) {
        sb.append(INDENT2 + name + CRLF);
      }
      sb.append(CRLF);
    }

    for (GarbageCollectorMXBean mbean : garbageCollectorMXBeans) {
      sb.append(requestedSm.getString("diagnostics.vmInfoGarbageCollectors", mbean.getName()));
      sb.append(":" + CRLF);
      sb.append(INDENT1 + "isValid: " + mbean.isValid() + CRLF);
      sb.append(INDENT1 + "mbean.getMemoryPoolNames: " + CRLF);
      String[] names = mbean.getMemoryPoolNames();
      Arrays.sort(names);
      for (String name : names) {
        sb.append(INDENT2 + name + CRLF);
      }
      sb.append(INDENT1 + "getCollectionCount: " + mbean.getCollectionCount() + CRLF);
      sb.append(INDENT1 + "getCollectionTime: " + mbean.getCollectionTime() + CRLF);
      sb.append(CRLF);
    }

    sb.append(requestedSm.getString("diagnostics.vmInfoMemory"));
    sb.append(":" + CRLF);
    sb.append(INDENT1 + "isVerbose: " + memoryMXBean.isVerbose() + CRLF);
    sb.append(
        INDENT1
            + "getObjectPendingFinalizationCount: "
            + memoryMXBean.getObjectPendingFinalizationCount()
            + CRLF);
    sb.append(formatMemoryUsage("heap", memoryMXBean.getHeapMemoryUsage()));
    sb.append(formatMemoryUsage("non-heap", memoryMXBean.getNonHeapMemoryUsage()));
    sb.append(CRLF);

    for (MemoryPoolMXBean mbean : memoryPoolMXBeans) {
      sb.append(requestedSm.getString("diagnostics.vmInfoMemoryPools", mbean.getName()));
      sb.append(":" + CRLF);
      sb.append(INDENT1 + "isValid: " + mbean.isValid() + CRLF);
      sb.append(INDENT1 + "getType: " + mbean.getType() + CRLF);
      sb.append(INDENT1 + "mbean.getMemoryManagerNames: " + CRLF);
      String[] names = mbean.getMemoryManagerNames();
      Arrays.sort(names);
      for (String name : names) {
        sb.append(INDENT2 + name + CRLF);
      }
      sb.append(INDENT1 + "isUsageThresholdSupported: " + mbean.isUsageThresholdSupported() + CRLF);
      try {
        sb.append(INDENT1 + "isUsageThresholdExceeded: " + mbean.isUsageThresholdExceeded() + CRLF);
      } catch (UnsupportedOperationException ex) {
        // IGNORE
      }
      sb.append(
          INDENT1
              + "isCollectionUsageThresholdSupported: "
              + mbean.isCollectionUsageThresholdSupported()
              + CRLF);
      try {
        sb.append(
            INDENT1
                + "isCollectionUsageThresholdExceeded: "
                + mbean.isCollectionUsageThresholdExceeded()
                + CRLF);
      } catch (UnsupportedOperationException ex) {
        // IGNORE
      }
      try {
        sb.append(INDENT1 + "getUsageThreshold: " + mbean.getUsageThreshold() + CRLF);
      } catch (UnsupportedOperationException ex) {
        // IGNORE
      }
      try {
        sb.append(INDENT1 + "getUsageThresholdCount: " + mbean.getUsageThresholdCount() + CRLF);
      } catch (UnsupportedOperationException ex) {
        // IGNORE
      }
      try {
        sb.append(
            INDENT1 + "getCollectionUsageThreshold: " + mbean.getCollectionUsageThreshold() + CRLF);
      } catch (UnsupportedOperationException ex) {
        // IGNORE
      }
      try {
        sb.append(
            INDENT1
                + "getCollectionUsageThresholdCount: "
                + mbean.getCollectionUsageThresholdCount()
                + CRLF);
      } catch (UnsupportedOperationException ex) {
        // IGNORE
      }
      sb.append(formatMemoryUsage("current", mbean.getUsage()));
      sb.append(formatMemoryUsage("collection", mbean.getCollectionUsage()));
      sb.append(formatMemoryUsage("peak", mbean.getPeakUsage()));
      sb.append(CRLF);
    }

    sb.append(requestedSm.getString("diagnostics.vmInfoSystem"));
    sb.append(":" + CRLF);
    Map<String, String> props = runtimeMXBean.getSystemProperties();
    ArrayList<String> keys = new ArrayList<String>(props.keySet());
    Collections.sort(keys);
    for (String prop : keys) {
      sb.append(INDENT1 + prop + ": " + props.get(prop) + CRLF);
    }
    sb.append(CRLF);

    sb.append(requestedSm.getString("diagnostics.vmInfoLogger"));
    sb.append(":" + CRLF);
    List<String> loggers = loggingMXBean.getLoggerNames();
    Collections.sort(loggers);
    for (String logger : loggers) {
      sb.append(
          INDENT1
              + logger
              + ": level="
              + loggingMXBean.getLoggerLevel(logger)
              + ", parent="
              + loggingMXBean.getParentLoggerName(logger)
              + CRLF);
    }
    sb.append(CRLF);

    return sb.toString();
  }