List of usage examples for java.lang.management ThreadMXBean findMonitorDeadlockedThreads
public long[] findMonitorDeadlockedThreads();
From source file:Main.java
public static String getDeadlockedThreads() { ThreadMXBean bean = ManagementFactory.getThreadMXBean(); long[] deadlocked = bean.findMonitorDeadlockedThreads(); if (deadlocked == null || deadlocked.length == 0) { return ""; }//from w ww . j a v a 2 s.c o m String buf = "Deadlocked thread IDs: "; for (long id : deadlocked) { buf += id + " "; } return buf; }
From source file:org.apache.bookkeeper.common.testing.util.TimedOutTestsListener.java
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);//from w w w .j a v a 2 s .c om printLockInfo(ti.getLockedSynchronizers(), out); out.println(); } out.close(); return stringWriter.toString(); } else { return null; } }
From source file:Main.java
public static String dumpThreads() { StringBuilder sb = new StringBuilder(); ThreadMXBean bean = ManagementFactory.getThreadMXBean(); long[] ids = bean.getAllThreadIds(); _printThreads(bean, ids, sb);/*from w w w. j av a2s. c o m*/ long[] deadlocks = bean.findDeadlockedThreads(); if (deadlocks != null && deadlocks.length > 0) { sb.append("deadlocked threads:\n"); _printThreads(bean, deadlocks, sb); } deadlocks = bean.findMonitorDeadlockedThreads(); if (deadlocks != null && deadlocks.length > 0) { sb.append("monitor deadlocked threads:\n"); _printThreads(bean, deadlocks, sb); } return sb.toString(); }
From source file:EventDispatchThreadHangMonitor.java
private static void checkForDeadlock() { ThreadMXBean threadBean = ManagementFactory.getThreadMXBean(); long[] threadIds = threadBean.findMonitorDeadlockedThreads(); if (threadIds == null) { return;//w w w . ja v a 2 s . c o m } Log.warn("deadlock detected involving the following threads:"); ThreadInfo[] threadInfos = threadBean.getThreadInfo(threadIds, Integer.MAX_VALUE); for (ThreadInfo info : threadInfos) { Log.warn("Thread #" + info.getThreadId() + " " + info.getThreadName() + " (" + info.getThreadState() + ") waiting on " + info.getLockName() + " held by " + info.getLockOwnerName() + stackTraceToString(info.getStackTrace())); } }
From source file:net.bull.javamelody.internal.model.JavaInformations.java
private static long[] getDeadlockedThreads(ThreadMXBean threadBean) { final long[] deadlockedThreads; if (threadBean.isSynchronizerUsageSupported()) { deadlockedThreads = threadBean.findDeadlockedThreads(); } else {/*w w w.ja v a 2 s .c o m*/ deadlockedThreads = threadBean.findMonitorDeadlockedThreads(); } if (deadlockedThreads != null) { Arrays.sort(deadlockedThreads); } return deadlockedThreads; }
From source file:ca.simplegames.micro.controllers.StatsController.java
public void execute(MicroContext context, Map configuration) throws ControllerException { Map<String, Object> systemInfo = new HashMap<String, Object>(); Map<String, Object> osMap = new HashMap<String, Object>(); MBeanServerConnection mbeanServer = ManagementFactory.getPlatformMBeanServer(); OperatingSystemMXBean sunOperatingSystemMXBean = null; try {/*from ww w. j ava 2 s .c o m*/ sunOperatingSystemMXBean = ManagementFactory.newPlatformMXBeanProxy(mbeanServer, ManagementFactory.OPERATING_SYSTEM_MXBEAN_NAME, OperatingSystemMXBean.class); } catch (IOException e) { throw new ControllerException(e.getMessage()); } Runtime rt = Runtime.getRuntime(); long totalMemory = rt.totalMemory() / MEGA_BYTE; long freeMemory = rt.freeMemory() / MEGA_BYTE; long usedMemory = totalMemory - freeMemory; final long p100 = (int) Math.round(((double) freeMemory / (double) totalMemory) * 100); Map<String, Long> memInfo = new HashMap<String, Long>(); memInfo.put("total", totalMemory); memInfo.put("used", usedMemory); memInfo.put("free", freeMemory); memInfo.put("percent_free", p100); systemInfo.put("memory", memInfo); systemInfo.put("powered_by", POWERED_BY_MICRO); //cpu usage in milli secs long currentCpuUsage = sunOperatingSystemMXBean.getProcessCpuTime() / 1000000; osMap.put("cpu_usage", currentCpuUsage); osMap.put("available_processors", sunOperatingSystemMXBean.getAvailableProcessors()); osMap.put("system_load_average", sunOperatingSystemMXBean.getSystemLoadAverage()); osMap.put("committed_virtual_memory_size", sunOperatingSystemMXBean.getCommittedVirtualMemorySize()); osMap.put("free_physical_memory_size", sunOperatingSystemMXBean.getFreePhysicalMemorySize()); osMap.put("total_physical_memory_size", sunOperatingSystemMXBean.getTotalPhysicalMemorySize()); osMap.put("free_swap_space_size", sunOperatingSystemMXBean.getFreeSwapSpaceSize()); osMap.put("total_swap_space_size", sunOperatingSystemMXBean.getTotalSwapSpaceSize()); systemInfo.put("os", osMap); List<GarbageCollectorMXBean> gc = ManagementFactory.getGarbageCollectorMXBeans(); List<Map> gcInfo = new ArrayList<Map>(); for (GarbageCollectorMXBean aGc : gc) { Map<String, Object> gcMap = new HashMap<String, Object>(); gcMap.put("name", aGc.getName()); gcMap.put("collection_count", aGc.getCollectionCount()); gcMap.put("collection_time", aGc.getCollectionTime()); gcInfo.add(gcMap); } systemInfo.put("gc", gcInfo); ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); Map<String, Object> threadInfoMap = new HashMap<String, Object>(); // more to come ;) threadInfoMap.put("peak_thread_count", threadMXBean.getPeakThreadCount()); threadInfoMap.put("thread_count", threadMXBean.getThreadCount()); threadInfoMap.put("total_started_thread_count", threadMXBean.getTotalStartedThreadCount()); long[] deadlockedThreads = threadMXBean.findMonitorDeadlockedThreads(); threadInfoMap.put("dead_locked_thread_count", deadlockedThreads != null ? deadlockedThreads.length : 0); systemInfo.put("thread_info", threadInfoMap); JSONObject sysinfoJson = new JSONObject(Collections.singletonMap("system_info", systemInfo)); String sysinfoString = null; try { sysinfoString = context.getRequest().getParameter("pretty") != null ? sysinfoJson.toString(2) : sysinfoJson.toString(); } catch (JSONException e) { e.printStackTrace(); throw new ControllerException(e.getMessage()); } context.getRackResponse().withContentType(Mime.mimeType(JSON_TYPE)).withBody(sysinfoString) .withContentLength(sysinfoString.length()).with(Rack.MESSAGE_STATUS, HttpServletResponse.SC_OK); context.halt(); }
From source file:org.fluentd.jvmwatcher.proxy.JvmClientProxy.java
/** * @return/* w w w. j ava 2 s . co m*/ * @throws IOException */ public long[] findDeadlockedThreads() throws IOException { ThreadMXBean threadMx = getThreadMXBean(); if (this.supportsLockUsage_ && threadMx.isSynchronizerUsageSupported()) { return threadMx.findDeadlockedThreads(); } else { return threadMx.findMonitorDeadlockedThreads(); } }
From source file:Main.java
public static String takeDumpJSON(ThreadMXBean threadMXBean) throws IOException { ThreadInfo[] threadInfos = threadMXBean.dumpAllThreads(true, true); List<Map<String, Object>> threads = new ArrayList<>(); for (ThreadInfo thread : threadInfos) { Map<String, Object> threadMap = new HashMap<>(); threadMap.put("name", thread.getThreadName()); threadMap.put("id", thread.getThreadId()); threadMap.put("state", thread.getThreadState().name()); List<String> stacktrace = new ArrayList<>(); for (StackTraceElement element : thread.getStackTrace()) { stacktrace.add(element.toString()); }//from ww w .j a va 2s .c om threadMap.put("stack", stacktrace); if (thread.getLockName() != null) { threadMap.put("lock_name", thread.getLockName()); } if (thread.getLockOwnerId() != -1) { threadMap.put("lock_owner_id", thread.getLockOwnerId()); } if (thread.getBlockedTime() > 0) { threadMap.put("blocked_time", thread.getBlockedTime()); } if (thread.getBlockedCount() > 0) { threadMap.put("blocked_count", thread.getBlockedCount()); } if (thread.getLockedMonitors().length > 0) { threadMap.put("locked_monitors", thread.getLockedMonitors()); } if (thread.getLockedSynchronizers().length > 0) { threadMap.put("locked_synchronizers", thread.getLockedSynchronizers()); } threads.add(threadMap); } ObjectMapper om = new ObjectMapper(); ObjectNode json = om.createObjectNode(); json.put("date", new Date().toString()); json.putPOJO("threads", threads); long[] deadlockedThreads = threadMXBean.findDeadlockedThreads(); long[] monitorDeadlockedThreads = threadMXBean.findMonitorDeadlockedThreads(); if (deadlockedThreads != null && deadlockedThreads.length > 0) { json.putPOJO("deadlocked_thread_ids", deadlockedThreads); } if (monitorDeadlockedThreads != null && monitorDeadlockedThreads.length > 0) { json.putPOJO("monitor_deadlocked_thread_ids", monitorDeadlockedThreads); } om.enable(SerializationFeature.INDENT_OUTPUT); return om.writerWithDefaultPrettyPrinter().writeValueAsString(json); }