/**
* Retrieve a JVM thread dump formatted using the given StringManager.
*
* @param requestedSm the StringManager to use
* @return the formatted JVM thread dump
*/
private static String getThreadDump(StringManager requestedSm) {
StringBuilder sb = new StringBuilder();
synchronized (timeformat) {
sb.append(timeformat.format(new Date()));
}
sb.append(CRLF);
sb.append(requestedSm.getString("diagnostics.threadDumpTitle"));
sb.append(" ");
sb.append(runtimeMXBean.getVmName());
sb.append(" (");
sb.append(runtimeMXBean.getVmVersion());
String vminfo = System.getProperty(vminfoSystemProperty);
if (vminfo != null) {
sb.append(" " + vminfo);
}
sb.append("):" + CRLF);
sb.append(CRLF);
ThreadInfo[] tis = threadMXBean.dumpAllThreads(true, true);
sb.append(getThreadDump(tis));
sb.append(findDeadlock());
return sb.toString();
}
@RequestMapping("/dumpThead")
@ResponseBody
public void doDumpThread(HttpServletRequest request, HttpServletResponse response) {
try {
String app = request.getParameter("app");
String threadId = request.getParameter("threadId");
ThreadMXBean tBean = JMConnManager.getThreadMBean(app);
JSONObject data = new JSONObject();
if (threadId != null) {
Long id = Long.valueOf(threadId);
ThreadInfo threadInfo = tBean.getThreadInfo(id, Integer.MAX_VALUE);
data.put("info", threadInfo.toString());
} else {
ThreadInfo[] dumpAllThreads = tBean.dumpAllThreads(false, false);
StringBuffer info = new StringBuffer();
for (ThreadInfo threadInfo : dumpAllThreads) {
info.append("\n").append(threadInfo);
}
data.put("info", info);
}
writeFile(request, response, data);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public static void main(String[] args) {
// 获取Java线程管理MXBean
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(false, false);
for (ThreadInfo threadInfo : threadInfos) {
System.out.println("[" + threadInfo.getThreadId() + " ] " + threadInfo.getThreadName());
}
}
public static CharSequence getThreadStats(
boolean lockedMonitors, boolean lockedSynchronizers, boolean stackTrace) {
StringBuilder list = new StringBuilder();
int threadCount = threadMXbean.getThreadCount();
int daemonCount = threadMXbean.getThreadCount();
int nonDaemonCount = threadCount - daemonCount;
int peakCount = threadMXbean.getPeakThreadCount();
long totalCount = threadMXbean.getTotalStartedThreadCount();
list.append("Live: .................... ").append(threadCount).append(" threads").append("\n");
list.append(" Non-Daemon: ......... ")
.append(nonDaemonCount)
.append(" threads")
.append("\n");
list.append(" Daemon: ............. ").append(daemonCount).append(" threads").append("\n");
list.append("Peak: .................... ").append(peakCount).append(" threads").append("\n");
list.append("Total started: ........... ").append(totalCount).append(" threads").append("\n");
list.append("=================================================").append("\n");
for (ThreadInfo info : threadMXbean.dumpAllThreads(lockedMonitors, lockedSynchronizers)) {
list.append("Thread #")
.append(info.getThreadId())
.append(" (")
.append(info.getThreadName())
.append(")")
.append("\n");
list.append("=================================================\n");
list.append("\tgetThreadState: ...... ").append(info.getThreadState()).append("\n");
list.append("\tgetWaitedTime: ....... ").append(info.getWaitedTime()).append("\n");
list.append("\tgetBlockedTime: ...... ").append(info.getBlockedTime()).append("\n");
for (MonitorInfo monitorInfo : info.getLockedMonitors()) {
list.append("\tLocked monitor: ....... ").append(monitorInfo).append("\n");
list.append("\t\t[")
.append(monitorInfo.getLockedStackDepth())
.append(".]: at ")
.append(monitorInfo.getLockedStackFrame())
.append("\n");
}
for (LockInfo lockInfo : info.getLockedSynchronizers()) {
list.append("\tLocked synchronizer: ...").append(lockInfo).append("\n");
}
if (stackTrace) {
list.append("\tgetStackTace: ..........\n");
for (StackTraceElement trace : info.getStackTrace())
list.append("\t\tat ").append(trace).append("\n");
}
list.append("=================================================\n");
}
return list;
}
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");
}
@Before
public void setUp() throws Exception {
final StackTraceElement rLine1 = new StackTraceElement("Blah", "blee", "Blah.java", 100);
when(runnable.getThreadName()).thenReturn("runnable");
when(runnable.getThreadId()).thenReturn(100L);
when(runnable.getThreadState()).thenReturn(Thread.State.RUNNABLE);
when(runnable.getStackTrace()).thenReturn(new StackTraceElement[] {rLine1});
when(runnable.getLockedMonitors()).thenReturn(new MonitorInfo[] {});
when(runnable.getLockedSynchronizers()).thenReturn(new LockInfo[] {});
when(threadMXBean.dumpAllThreads(true, true)).thenReturn(new ThreadInfo[] {runnable});
}
private String threadDumpDescription() {
StringBuilder threadDumpDescription = new StringBuilder();
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(true, true);
for (ThreadInfo threadInfo : threadInfos) {
threadDumpDescription.append(
format(
"\"%s\"%n\tjava.lang.Thread.State: %s",
threadInfo.getThreadName(), threadInfo.getThreadState()));
for (StackTraceElement stackTraceElement : threadInfo.getStackTrace()) {
threadDumpDescription.append(LINE_SEPARATOR + "\t\tat " + stackTraceElement);
}
threadDumpDescription.append(LINE_SEPARATOR + LINE_SEPARATOR);
}
return threadDumpDescription.toString();
}
@RequestMapping("/loadThreadInfo")
@ResponseBody
public JSONObject doLoadThreadInfo(HttpServletRequest request) {
try {
String app = request.getParameter("app");
ThreadMXBean tBean = JMConnManager.getThreadMBean(app);
ThreadInfo[] allThreads = tBean.dumpAllThreads(false, false);
JSONObject root = new JSONObject();
JSONArray detail = new JSONArray();
HashMap<State, Integer> state = new HashMap<Thread.State, Integer>();
for (ThreadInfo info : allThreads) {
JSONObject th = new JSONObject();
long threadId = info.getThreadId();
long cpu = tBean.getThreadCpuTime(threadId);
State tState = info.getThreadState();
th.put("id", threadId);
th.put("state", tState);
th.put("name", info.getThreadName());
th.put("cpu", TimeUnit.NANOSECONDS.toMillis(cpu));
detail.add(th);
Integer vl = state.get(tState);
if (vl == null) {
state.put(tState, 0);
} else {
state.put(tState, vl + 1);
}
}
root.put("state", state);
root.put("detail", detail);
root.put("total", tBean.getThreadCount());
root.put("time", System.currentTimeMillis());
root.put("deamon", tBean.getDaemonThreadCount());
return root;
} catch (IOException e) {
throw new RuntimeException(e);
}
}
/**
* Collect all of the dependencies that exist between threads in this VM, using java management
* beans and the {@link DependencyMonitor}.
*
* <p>Threads may depend on locks, or on other resources that are tracked by the {@link
* DependencyMonitor}.
*
* @arg locality a name tag to stick on entities to help associate them with this JVM and
* distinguish them from entities from other jvms
* @return All of the dependencies between threads and locks or other resources on this VM.
*/
public static Set<Dependency> collectAllDependencies(Serializable locality) {
ThreadMXBean bean = ManagementFactory.getThreadMXBean();
ThreadInfo[] infos = bean.dumpAllThreads(true, true);
Set<Dependency> results = new HashSet<Dependency>();
Map<Long, ThreadInfo> threadInfos = new HashMap<Long, ThreadInfo>();
for (ThreadInfo info : infos) {
// This can happen if the thread died.
if (info == null) {
continue;
}
for (LockInfo monitor : info.getLockedMonitors()) {
Dependency dependency =
new Dependency(new LocalLockInfo(locality, monitor), new LocalThread(locality, info));
results.add(dependency);
}
for (LockInfo sync : info.getLockedSynchronizers()) {
Dependency dependency =
new Dependency(new LocalLockInfo(locality, sync), new LocalThread(locality, info));
results.add(dependency);
}
LockInfo waitingFor = info.getLockInfo();
if (waitingFor != null) {
Dependency dependency =
new Dependency(
new LocalThread(locality, info), new LocalLockInfo(locality, waitingFor));
results.add(dependency);
}
threadInfos.put(info.getThreadId(), info);
}
Set<Dependency> monitoredDependencies =
collectFromDependencyMonitor(bean, locality, threadInfos);
results.addAll(monitoredDependencies);
return results;
}
protected String generateThreadDump() {
StringBuilder dump = new StringBuilder();
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(true, true);
long currentThreadId = Thread.currentThread().getId();
for (ThreadInfo threadInfo : threadInfos) {
long threadId = threadInfo.getThreadId();
if (threadId == currentThreadId) {
continue;
}
dump.append('"');
dump.append(threadInfo.getThreadName());
dump.append("\" ");
Thread.State state = threadInfo.getThreadState();
dump.append("\n\tjava.lang.Thread.State: ");
dump.append(state);
if (threadInfo.getLockName() != null) {
dump.append(", on lock=").append(threadInfo.getLockName());
}
if (threadInfo.getLockOwnerName() != null) {
dump.append(", owned by ").append(threadInfo.getLockOwnerName());
dump.append(", id=").append(threadInfo.getLockOwnerId());
}
if (THREAD_CPU_TIME_INFO_AVAILABLE) {
dump.append(", cpu=").append(threadMXBean.getThreadCpuTime(threadId)).append(" nsecs");
dump.append(", usr="******" nsecs");
}
if (THREAD_CONTENTION_INFO_AVAILABLE) {
dump.append(", blocked=").append(threadInfo.getBlockedTime()).append(" msecs");
dump.append(", waited=").append(threadInfo.getWaitedTime()).append(" msecs");
}
StackTraceElement[] stackTraceElements = threadInfo.getStackTrace();
for (StackTraceElement stackTraceElement : stackTraceElements) {
dump.append("\n\t\tat ");
dump.append(stackTraceElement);
}
dump.append("\n\n");
}
return dump.toString();
}
private static void dumpThreadInfo(
StringBuilder threadDump, boolean withLocks, ThreadMXBean threadMx) {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String timestamp = dateFormat.format(new Date());
threadDump.append(timestamp);
threadDump.append("\nFull thread dump ");
threadDump.append("\n");
if (withLocks) {
ThreadInfo[] threadInfos = threadMx.dumpAllThreads(true, true);
for (ThreadInfo threadInfo : threadInfos) {
printThreadInfo(threadInfo, threadDump);
LockInfo[] syncs = threadInfo.getLockedSynchronizers();
printLockInfo(syncs, threadDump);
}
threadDump.append("\n");
} else {
long[] threadIds = threadMx.getAllThreadIds();
ThreadInfo[] threadInfos = threadMx.getThreadInfo(threadIds, Integer.MAX_VALUE);
for (ThreadInfo threadInfo : threadInfos) printThreadInfo(threadInfo, threadDump);
}
}
public List<ThreadInfo> getThreadDump() {
return Arrays.asList(threadMXBean.dumpAllThreads(dumpLockedMonitors, dumpLockedSynchronizers));
}