List of usage examples for java.lang.management ThreadInfo getLockedMonitors
public MonitorInfo[] getLockedMonitors()
From source file:DeadLockDetector.java
/** * Check if there is a DeadLock./*from w ww.ja v a 2 s. co m*/ */ @Override public final void run() { boolean deadlock = false; while (!deadlock) { try { long[] ids = tmx.findDeadlockedThreads(); if (ids != null) { /** deadlock found :/ */ deadlock = true; ThreadInfo[] tis = tmx.getThreadInfo(ids, true, true); String info = "DeadLock Found!\n"; for (ThreadInfo ti : tis) { info += ti.toString(); } for (ThreadInfo ti : tis) { LockInfo[] locks = ti.getLockedSynchronizers(); MonitorInfo[] monitors = ti.getLockedMonitors(); if (locks.length == 0 && monitors.length == 0) { /** this thread is deadlocked but its not guilty */ continue; } ThreadInfo dl = ti; info += "Java-level deadlock:\n"; info += "\t" + dl.getThreadName() + " is waiting to lock " + dl.getLockInfo().toString() + " which is held by " + dl.getLockOwnerName() + "\n"; while ((dl = tmx.getThreadInfo(new long[] { dl.getLockOwnerId() }, true, true)[0]) .getThreadId() != ti.getThreadId()) { info += "\t" + dl.getThreadName() + " is waiting to lock " + dl.getLockInfo().toString() + " which is held by " + dl.getLockOwnerName() + "\n"; } } System.out.println(info); if (doWhenDL == RESTART) { System.exit(0); } } Thread.sleep(sleepTime); } catch (Exception e) { System.out.println(e); } } }
From source file:FullThreadDump.java
private void printThreadInfo(ThreadInfo ti) { // print thread information printThread(ti);//from w w w . jav a 2s. c om // print stack trace with locks StackTraceElement[] stacktrace = ti.getStackTrace(); MonitorInfo[] monitors = ti.getLockedMonitors(); for (int i = 0; i < stacktrace.length; i++) { StackTraceElement ste = stacktrace[i]; System.out.println(INDENT + "at " + ste.toString()); for (MonitorInfo mi : monitors) { if (mi.getLockedStackDepth() == i) { System.out.println(INDENT + " - locked " + mi); } } } System.out.println(); }
From source file:com.thoughtworks.go.server.service.support.ThreadInformationProvider.java
private Map<String, Object> getDeadLockThreadInformation(ThreadMXBean threadMXBean) { LinkedHashMap<String, Object> json = new LinkedHashMap<>(); long[] deadlockedThreads = threadMXBean.findDeadlockedThreads(); if (deadlockedThreads != null && deadlockedThreads.length > 0) { json.put("Count", deadlockedThreads.length); for (long deadlockedThread : deadlockedThreads) { LinkedHashMap<String, Object> threadsInfo = new LinkedHashMap<>(); LinkedHashMap<String, Object> lockedMonitorsInfo = new LinkedHashMap<>(); LinkedHashMap<String, Object> stackTrackInfo = new LinkedHashMap<>(); ThreadInfo threadInfo = threadMXBean.getThreadInfo(deadlockedThread); LockInfo lockInfo = threadInfo.getLockInfo(); if (lockInfo != null) { threadsInfo.put(threadInfo.getThreadName(), lockInfo); } else { threadsInfo.put(threadInfo.getThreadName(), "This thread is not waiting for any locks"); }/*from w ww . j ava2 s .c om*/ MonitorInfo[] lockedMonitors = threadInfo.getLockedMonitors(); for (MonitorInfo lockedMonitor : lockedMonitors) { lockedMonitorsInfo.put("Monitor for class " + lockedMonitor.getClassName(), "taken at stack frame " + lockedMonitor.getLockedStackFrame()); } stackTrackInfo.put(Long.toString(deadlockedThread), Arrays.toString(threadInfo.getStackTrace())); json.put("Thread Information", threadsInfo); json.put("Monitor Information Stack Frame where locks were taken", lockedMonitorsInfo); json.put("Stack Trace Of DeadLock Threads", stackTrackInfo); } } return json; }
From source file:fullThreadDump.java
private String printThreadInfo(ThreadInfo ti) { // print stack trace with locks StackTraceElement[] stacktrace = ti.getStackTrace(); MonitorInfo[] monitors = ti.getLockedMonitors(); currentThreadInfo result = new currentThreadInfo(ti); StringBuilder threadOutput = new StringBuilder(result.getThreadName()); threadOutput.append(result.getThreadStateDesc()); if (stats == true) { threadOutput.append(result.getThreadStats()); }/* w w w . j a v a 2 s.c o m*/ for (int i = 0; i < stacktrace.length; i++) { StackTraceElement ste = stacktrace[i]; if (i == 0) { threadOutput.append("\n java.lang.Thread.State: " + result.getThreadState()); threadOutput.append("\n" + INDENT + "at " + ste.toString()); if (ste.toString().contains("java.lang.Object.wait(Native Method)") && result.getLockName() != null) { threadOutput.append("\n" + INDENT + "- waiting on " + result.getLockName()); } if (ste.toString().contains("sun.misc.Unsafe.park(Native Method)") && result.getLockName() != null) { threadOutput.append("\n" + INDENT + "- parking to wait for " + result.getLockName()); } if (result.getThreadStateDesc().contains("BLOCKED") && result.getLockName() != null) { threadOutput.append("\n" + INDENT + "- waiting to lock " + result.getLockName()); } } else { threadOutput.append("\n" + INDENT + "at " + ste.toString()); } for (MonitorInfo mi : monitors) { if (mi.getLockedStackDepth() == i) { threadOutput.append("\n" + INDENT + " - locked " + mi); } } } threadOutput.append("\n"); //System.out.print(threadOutput.toString()); //printMonitorInfo(ti, monitors); return threadOutput.toString(); }
From source file:com.thoughtworks.go.server.service.support.ThreadInformationProvider.java
private TreeMap<Long, Map<String, Object>> getStackTraceInformation(ThreadMXBean threadMXBean) { TreeMap<Long, Map<String, Object>> traces = new TreeMap<>(); ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(true, true); for (ThreadInfo threadInfo : threadInfos) { LinkedHashMap<String, Object> threadStackTrace = new LinkedHashMap<>(); threadStackTrace.put("Id", threadInfo.getThreadId()); threadStackTrace.put("Name", threadInfo.getThreadName()); threadStackTrace.put("State", threadInfo.getThreadState()); LinkedHashMap<String, Object> lockMonitorInfo = new LinkedHashMap<>(); MonitorInfo[] lockedMonitors = threadInfo.getLockedMonitors(); ArrayList<Map<String, Object>> lockedMonitorsJson = new ArrayList<>(); for (MonitorInfo lockedMonitor : lockedMonitors) { LinkedHashMap<String, Object> lockedMonitorJson = new LinkedHashMap<>(); lockedMonitorJson.put("Class", lockedMonitor.getClassName()); lockedMonitorJson.put("IdentityHashCode", lockedMonitor.getIdentityHashCode()); lockedMonitorJson.put("LockedStackDepth", lockedMonitor.getLockedStackDepth()); lockedMonitorJson.put("StackFrame", lockedMonitor.getLockedStackFrame().toString()); lockedMonitorsJson.add(lockedMonitorJson); }/* ww w. jav a 2 s . c o m*/ lockMonitorInfo.put("Locked Monitors", lockedMonitorsJson); lockMonitorInfo.put("Locked Synchronizers", asJSON(threadInfo.getLockedSynchronizers())); threadStackTrace.put("Lock Monitor Info", lockMonitorInfo); LinkedHashMap<String, Object> blockedInfo = new LinkedHashMap<>(); blockedInfo.put("Blocked Time", threadInfo.getBlockedTime() == -1 ? null : threadInfo.getBlockedTime()); blockedInfo.put("Blocked Count", threadInfo.getBlockedCount()); threadStackTrace.put("Blocked Info", blockedInfo); LinkedHashMap<String, Object> timeInfo = new LinkedHashMap<>(); timeInfo.put("Waited Time", threadInfo.getWaitedTime() == -1 ? null : threadInfo.getWaitedTime()); timeInfo.put("Waited Count", threadInfo.getWaitedCount()); threadStackTrace.put("Time Info", timeInfo); LinkedHashMap<String, Object> lockInfoMap = new LinkedHashMap<>(); LockInfo lockInfo = threadInfo.getLockInfo(); lockInfoMap.put("Locked On", asJSON(lockInfo)); lockInfoMap.put("Lock Owner Thread Id", threadInfo.getLockOwnerId() == -1 ? null : threadInfo.getLockOwnerId()); lockInfoMap.put("Lock Owner Thread Name", threadInfo.getLockOwnerName()); threadStackTrace.put("Lock Info", lockInfoMap); LinkedHashMap<String, Object> stateInfo = new LinkedHashMap<>(); stateInfo.put("Suspended", threadInfo.isSuspended()); stateInfo.put("InNative", threadInfo.isInNative()); threadStackTrace.put("State Info", stateInfo); threadStackTrace.put("Stack Trace", asJSON(threadInfo.getStackTrace())); traces.put(threadInfo.getThreadId(), threadStackTrace); } return traces; }
From source file:com.thoughtworks.go.server.service.support.ServerRuntimeInformationProvider.java
private void threadInfo(ThreadMXBean threadMXBean, InformationStringBuilder builder) { builder.addSection("Thread information"); builder.append(String.format("Current: %s, Total: %s, Daemon: %s, Peak: %s\n", threadMXBean.getThreadCount(), threadMXBean.getTotalStartedThreadCount(), threadMXBean.getDaemonThreadCount(), threadMXBean.getPeakThreadCount())); long[] deadlockedThreads = threadMXBean.findDeadlockedThreads(); if (deadlockedThreads != null && deadlockedThreads.length > 0) { builder.append(String.format("Found %s dead locked threads. Here is there information.\n", deadlockedThreads.length)); for (long deadlockedThread : deadlockedThreads) { ThreadInfo threadInfo = threadMXBean.getThreadInfo(deadlockedThread); LockInfo lockInfo = threadInfo.getLockInfo(); if (lockInfo != null) { builder.append(String.format("LockInfo: %s", lockInfo)); } else { builder.append("This thread is not waiting for any locks\n"); }//from w w w . j a v a 2 s .co m builder.append(String.format("Monitor Info - Stack Frame where locks were taken.\n")); MonitorInfo[] lockedMonitors = threadInfo.getLockedMonitors(); for (MonitorInfo lockedMonitor : lockedMonitors) { builder.append(String.format("Monitor for class '%s' taken at stack frame '%s'.", lockedMonitor.getClassName(), lockedMonitor.getLockedStackFrame())); } builder.append("The stack trace of the deadlocked thread\n"); builder.append(Arrays.toString(threadInfo.getStackTrace())); } } builder.addSubSection("All thread stacktraces"); ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(true, true); for (ThreadInfo threadInfo : threadInfos) { builder.append(String.format("%s, %s, %s\n", threadInfo.getThreadId(), threadInfo.getThreadName(), threadInfo.getThreadState())); MonitorInfo[] lockedMonitors = threadInfo.getLockedMonitors(); builder.append("Locked Monitors:\n"); for (MonitorInfo lockedMonitor : lockedMonitors) { builder.append(String.format("%s at %s", lockedMonitor, lockedMonitor.getLockedStackFrame())); } LockInfo[] lockedSynchronizers = threadInfo.getLockedSynchronizers(); builder.append("Locked Synchronizers:\n"); for (LockInfo lockedSynchronizer : lockedSynchronizers) { builder.append(lockedSynchronizer); } builder.append("Stacktrace:\n "); builder.append(StringUtils.join(threadInfo.getStackTrace(), "\n ")); builder.append("\n\n"); } }
From source file:com.thoughtworks.go.server.service.support.ThreadInformationProvider.java
@Override public void appendInformation(InformationStringBuilder builder) { ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); builder.addSection("Thread information"); builder.append(String.format("Current: %s, Total: %s, Daemon: %s, Peak: %s\n", threadMXBean.getThreadCount(), threadMXBean.getTotalStartedThreadCount(), threadMXBean.getDaemonThreadCount(), threadMXBean.getPeakThreadCount())); long[] deadlockedThreads = threadMXBean.findDeadlockedThreads(); if (deadlockedThreads != null && deadlockedThreads.length > 0) { builder.append(String.format("Found %s dead locked threads. Here is there information.\n", deadlockedThreads.length)); for (long deadlockedThread : deadlockedThreads) { ThreadInfo threadInfo = threadMXBean.getThreadInfo(deadlockedThread); LockInfo lockInfo = threadInfo.getLockInfo(); if (lockInfo != null) { builder.append(String.format("LockInfo: %s", lockInfo)); } else { builder.append("This thread is not waiting for any locks\n"); }//w w w . j a v a 2s .co m builder.append(String.format("Monitor Info - Stack Frame where locks were taken.\n")); MonitorInfo[] lockedMonitors = threadInfo.getLockedMonitors(); for (MonitorInfo lockedMonitor : lockedMonitors) { builder.append(String.format("Monitor for class '%s' taken at stack frame '%s'.", lockedMonitor.getClassName(), lockedMonitor.getLockedStackFrame())); } builder.append("The stack trace of the deadlocked thread\n"); builder.append(Arrays.toString(threadInfo.getStackTrace())); } } builder.addSubSection("All thread stacktraces"); ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(true, true); for (ThreadInfo threadInfo : threadInfos) { builder.append(String.format("%s, %s, %s\n", threadInfo.getThreadId(), threadInfo.getThreadName(), threadInfo.getThreadState())); MonitorInfo[] lockedMonitors = threadInfo.getLockedMonitors(); builder.append("Locked Monitors:\n"); for (MonitorInfo lockedMonitor : lockedMonitors) { builder.append(String.format("%s at %s", lockedMonitor, lockedMonitor.getLockedStackFrame())); } LockInfo[] lockedSynchronizers = threadInfo.getLockedSynchronizers(); builder.append("Locked Synchronizers:\n"); for (LockInfo lockedSynchronizer : lockedSynchronizers) { builder.append(lockedSynchronizer); } builder.append("Stacktrace:\n "); builder.append(StringUtils.join(threadInfo.getStackTrace(), "\n ")); builder.append("\n\n"); } }
From source file:Main.java
private static String threadInfoToString(ThreadInfo threadInfo) { StringBuilder sb = new StringBuilder("\"" + threadInfo.getThreadName() + "\"" + " Id=" + threadInfo.getThreadId() + " " + threadInfo.getThreadState()); if (threadInfo.getLockName() != null) { sb.append(" on " + threadInfo.getLockName()); }//from w ww . jav a 2 s . c om if (threadInfo.getLockOwnerName() != null) { sb.append(" owned by \"" + threadInfo.getLockOwnerName() + "\" Id=" + threadInfo.getLockOwnerId()); } if (threadInfo.isSuspended()) { sb.append(" (suspended)"); } if (threadInfo.isInNative()) { sb.append(" (in native)"); } sb.append('\n'); int i = 0; for (; i < threadInfo.getStackTrace().length; i++) { StackTraceElement ste = threadInfo.getStackTrace()[i]; sb.append("\tat " + ste.toString()); sb.append('\n'); if (i == 0 && threadInfo.getLockInfo() != null) { Thread.State ts = threadInfo.getThreadState(); switch (ts) { case BLOCKED: sb.append("\t- blocked on " + threadInfo.getLockInfo()); sb.append('\n'); break; case WAITING: sb.append("\t- waiting on " + threadInfo.getLockInfo()); sb.append('\n'); break; case TIMED_WAITING: sb.append("\t- waiting on " + threadInfo.getLockInfo()); sb.append('\n'); break; default: } } for (MonitorInfo mi : threadInfo.getLockedMonitors()) { if (mi.getLockedStackDepth() == i) { sb.append("\t- locked " + mi); sb.append('\n'); } } } LockInfo[] locks = threadInfo.getLockedSynchronizers(); if (locks.length > 0) { sb.append("\n\tNumber of locked synchronizers = " + locks.length); sb.append('\n'); for (LockInfo li : locks) { sb.append("\t- " + li); sb.append('\n'); } } sb.append('\n'); return sb.toString(); }
From source file:Main.java
static public String toString(ThreadInfo threadInfo) { StringBuilder sb = new StringBuilder("\"" + threadInfo.getThreadName() + "\"" + " Id=" + threadInfo.getThreadId() + " " + threadInfo.getThreadState()); if (threadInfo.getLockName() != null) { sb.append(" on " + threadInfo.getLockName()); }/* w w w . j a v a 2 s.c o m*/ if (threadInfo.getLockOwnerName() != null) { sb.append(" owned by \"" + threadInfo.getLockOwnerName() + "\" Id=" + threadInfo.getLockOwnerId()); } if (threadInfo.isSuspended()) { sb.append(" (suspended)"); } if (threadInfo.isInNative()) { sb.append(" (in native)"); } sb.append('\n'); int i = 0; StackTraceElement[] stackTrace = threadInfo.getStackTrace(); for (StackTraceElement ste : stackTrace) { // for (; i < threadInfo.getStackTrace().length && i < 64; i++) { // StackTraceElement ste = stackTrace[i]; sb.append("\tat " + ste.toString()); sb.append('\n'); if (i == 0 && threadInfo.getLockInfo() != null) { Thread.State ts = threadInfo.getThreadState(); switch (ts) { case BLOCKED: sb.append("\t- blocked on " + threadInfo.getLockInfo()); sb.append('\n'); break; case WAITING: sb.append("\t- waiting on " + threadInfo.getLockInfo()); sb.append('\n'); break; case TIMED_WAITING: sb.append("\t- waiting on " + threadInfo.getLockInfo()); sb.append('\n'); break; default: } } for (MonitorInfo mi : threadInfo.getLockedMonitors()) { if (mi.getLockedStackDepth() == i) { sb.append("\t- locked " + mi); sb.append('\n'); } } } if (i < stackTrace.length) { sb.append("\t..."); sb.append('\n'); } LockInfo[] locks = threadInfo.getLockedSynchronizers(); if (locks.length > 0) { sb.append("\n\tNumber of locked synchronizers = " + locks.length); sb.append('\n'); for (LockInfo li : locks) { sb.append("\t- " + li); sb.append('\n'); } } sb.append('\n'); return sb.toString(); }
From source file:org.ScripterRon.JavaBitcoin.RpcHandler.java
/** * Process 'getstacktraces' request//from ww w . j av a 2s . co m * * Response parameters: * locks - An array of lock objects for locks with waiters * threads - An array of thread objects * * Lock object: * name - Lock class name * hash - Lock identity hash code * thread - Identifier of thread holding the lock * * Monitor object: * name - Monitor class name * hash - Monitor identity hash * depth - Stack depth where monitor locked * trace - Stack element where monitor locked * * Thread object: * blocked - Lock object if thread is waiting on a lock * id - Thread identifier * locks - Array of monitor objects for locks held by this thread * name - Thread name * state - Thread state * trace - Array of stack trace elements * * @return Response as a JSONObject */ private JSONObject getStackTraces() { JSONArray threadsJSON = new JSONArray(); JSONArray locksJSON = new JSONArray(); ThreadMXBean tmxBean = ManagementFactory.getThreadMXBean(); boolean tmxMI = tmxBean.isObjectMonitorUsageSupported(); ThreadInfo[] tList = tmxBean.dumpAllThreads(tmxMI, false); // // Generate the response // for (ThreadInfo tInfo : tList) { JSONObject threadJSON = new JSONObject(); // // General thread information // threadJSON.put("id", tInfo.getThreadId()); threadJSON.put("name", tInfo.getThreadName()); threadJSON.put("state", tInfo.getThreadState().toString()); // // Gather lock usage // if (tmxMI) { MonitorInfo[] mList = tInfo.getLockedMonitors(); if (mList.length > 0) { JSONArray monitorsJSON = new JSONArray(); for (MonitorInfo mInfo : mList) { JSONObject lockJSON = new JSONObject(); lockJSON.put("name", mInfo.getClassName()); lockJSON.put("hash", mInfo.getIdentityHashCode()); lockJSON.put("depth", mInfo.getLockedStackDepth()); lockJSON.put("trace", mInfo.getLockedStackFrame().toString()); monitorsJSON.add(lockJSON); } threadJSON.put("locks", monitorsJSON); } if (tInfo.getThreadState() == Thread.State.BLOCKED) { LockInfo lInfo = tInfo.getLockInfo(); if (lInfo != null) { JSONObject lockJSON = new JSONObject(); lockJSON.put("name", lInfo.getClassName()); lockJSON.put("hash", lInfo.getIdentityHashCode()); lockJSON.put("thread", tInfo.getLockOwnerId()); threadJSON.put("blocked", lockJSON); boolean addLock = true; for (Object lock : locksJSON) { if (((String) ((JSONObject) lock).get("name")).equals(lInfo.getClassName())) { addLock = false; break; } } if (addLock) locksJSON.add(lockJSON); } } } // // Add the stack trace // StackTraceElement[] elements = tInfo.getStackTrace(); JSONArray traceJSON = new JSONArray(); for (StackTraceElement element : elements) traceJSON.add(element.toString()); threadJSON.put("trace", traceJSON); // // Add the thread to the response // threadsJSON.add(threadJSON); } // // Return the response // JSONObject response = new JSONObject(); response.put("threads", threadsJSON); response.put("locks", locksJSON); return response; }