/**
* Print all of the thread's information and stack traces.
*
* @param sb
* @param info
* @param indent
*/
public static void appendThreadInfo(StringBuilder sb, ThreadInfo info, String indent) {
boolean contention = threadBean.isThreadContentionMonitoringEnabled();
if (info == null) {
sb.append(indent).append("Inactive (perhaps exited while monitoring was done)\n");
return;
}
String taskName = getTaskName(info.getThreadId(), info.getThreadName());
sb.append(indent).append("Thread ").append(taskName).append(":\n");
Thread.State state = info.getThreadState();
sb.append(indent).append(" State: ").append(state).append("\n");
sb.append(indent).append(" Blocked count: ").append(info.getBlockedCount()).append("\n");
sb.append(indent).append(" Waited count: ").append(info.getWaitedCount()).append("\n");
if (contention) {
sb.append(indent).append(" Blocked time: " + info.getBlockedTime()).append("\n");
sb.append(indent).append(" Waited time: " + info.getWaitedTime()).append("\n");
}
if (state == Thread.State.WAITING) {
sb.append(indent).append(" Waiting on ").append(info.getLockName()).append("\n");
} else if (state == Thread.State.BLOCKED) {
sb.append(indent).append(" Blocked on ").append(info.getLockName()).append("\n");
sb.append(indent)
.append(" Blocked by ")
.append(getTaskName(info.getLockOwnerId(), info.getLockOwnerName()))
.append("\n");
}
sb.append(indent).append(" Stack:").append("\n");
for (StackTraceElement frame : info.getStackTrace()) {
sb.append(indent).append(" ").append(frame.toString()).append("\n");
}
}
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();
}
/**
* Formats the thread dump for one thread.
*
* @param ti the ThreadInfo describing the thread
* @return the formatted thread dump
*/
private static String getThreadDump(ThreadInfo ti) {
StringBuilder sb = new StringBuilder(getThreadDumpHeader(ti));
for (LockInfo li : ti.getLockedSynchronizers()) {
sb.append(INDENT2 + "locks " + li.toString() + CRLF);
}
boolean start = true;
StackTraceElement[] stes = ti.getStackTrace();
Object[] monitorDepths = new Object[stes.length];
MonitorInfo[] mis = ti.getLockedMonitors();
for (int i = 0; i < mis.length; i++) {
monitorDepths[mis[i].getLockedStackDepth()] = mis[i];
}
for (int i = 0; i < stes.length; i++) {
StackTraceElement ste = stes[i];
sb.append(INDENT2 + "at " + ste.toString() + CRLF);
if (start) {
if (ti.getLockName() != null) {
sb.append(INDENT2 + "- waiting on (a " + ti.getLockName() + ")");
if (ti.getLockOwnerName() != null) {
sb.append(" owned by " + ti.getLockOwnerName() + " Id=" + ti.getLockOwnerId());
}
sb.append(CRLF);
}
start = false;
}
if (monitorDepths[i] != null) {
MonitorInfo mi = (MonitorInfo) monitorDepths[i];
sb.append(
INDENT2
+ "- locked (a "
+ mi.toString()
+ ")"
+ " index "
+ mi.getLockedStackDepth()
+ " frame "
+ mi.getLockedStackFrame().toString());
sb.append(CRLF);
}
}
return sb.toString();
}
private static SimpleOrderedMap<Object> getThreadInfo(ThreadInfo ti, ThreadMXBean tmbean) {
SimpleOrderedMap<Object> info = new SimpleOrderedMap<Object>();
long tid = ti.getThreadId();
info.add("id", tid);
info.add("name", ti.getThreadName());
info.add("state", ti.getThreadState().toString());
if (ti.getLockName() != null) {
info.add("lock", ti.getLockName());
}
if (ti.isSuspended()) {
info.add("suspended", true);
}
if (ti.isInNative()) {
info.add("native", true);
}
if (tmbean.isThreadCpuTimeSupported()) {
info.add("cpuTime", formatNanos(tmbean.getThreadCpuTime(tid)));
info.add("userTime", formatNanos(tmbean.getThreadUserTime(tid)));
}
if (ti.getLockOwnerName() != null) {
SimpleOrderedMap<Object> owner = new SimpleOrderedMap<Object>();
owner.add("name", ti.getLockOwnerName());
owner.add("id", ti.getLockOwnerId());
}
// Add the stack trace
int i = 0;
String[] trace = new String[ti.getStackTrace().length];
for (StackTraceElement ste : ti.getStackTrace()) {
trace[i++] = ste.toString();
}
info.add("stackTrace", trace);
return info;
}
private static void printThread(ThreadInfo threadInfo, StringBuilder threadDump) {
StringBuilder sb =
new StringBuilder(
"\""
+ threadInfo.getThreadName()
+ "\""
+ " nid="
+ threadInfo.getThreadId()
+ " state="
+ threadInfo.getThreadState());
if (threadInfo.getLockName() != null && threadInfo.getThreadState() != Thread.State.BLOCKED) {
String[] lockInfo = threadInfo.getLockName().split("@");
sb.append("\n" + INDENT + "- waiting on <0x" + lockInfo[1] + "> (a " + lockInfo[0] + ")");
sb.append("\n" + INDENT + "- locked <0x" + lockInfo[1] + "> (a " + lockInfo[0] + ")");
} else if (threadInfo.getLockName() != null
&& threadInfo.getThreadState() == Thread.State.BLOCKED) {
String[] lockInfo = threadInfo.getLockName().split("@");
sb.append(
"\n" + INDENT + "- waiting to lock <0x" + lockInfo[1] + "> (a " + lockInfo[0] + ")");
}
if (threadInfo.isSuspended()) sb.append(" (suspended)");
if (threadInfo.isInNative()) sb.append(" (running in native)");
threadDump.append(sb.toString());
threadDump.append("\n");
if (threadInfo.getLockOwnerName() != null) {
threadDump.append(
INDENT
+ " owned by "
+ threadInfo.getLockOwnerName()
+ " id="
+ threadInfo.getLockOwnerId());
threadDump.append("\n");
}
}
/**
* スレッドの状態をStringBufferにして返します。<br>
*
* @param info {@link ThreadInfo}オブジェクト
* @return スレッドの状態をStringBufferにして返したもの。
*/
private static StringBuilder getThreadInfoBuffer(ThreadInfo info) {
StringBuilder sb =
new StringBuilder(
"\""
+ info.getThreadName()
+ "\""
+ " Id="
+ info.getThreadId()
+ " "
+ info.getThreadState());
if (info.getLockName() != null) {
sb.append(" on " + info.getLockName());
}
if (info.getLockOwnerName() != null) {
sb.append(" owned by \"" + info.getLockOwnerName() + "\" Id=" + info.getLockOwnerId());
}
if (info.isSuspended()) {
sb.append(" (suspended)");
}
if (info.isInNative()) {
sb.append(" (in native)");
}
return sb;
}
@DwrPermission(admin = true)
public ProcessResult getThreadInfo() {
synchronized (threadInfos) {
ProcessResult result = new ProcessResult();
// All of the last thread ids. Ids are removed from this set as they are processed. If ids
// remain,
// it means the thread is gone and should be removed from the map.
Set<Long> threadIds = new HashSet<>(threadInfos.keySet());
ThreadInfo[] threads = tmxb.getThreadInfo(tmxb.getAllThreadIds(), Integer.MAX_VALUE);
List<ThreadInfoBean> beans = new ArrayList<>();
for (ThreadInfo thread : threads) {
if (thread == null) continue;
ThreadInfoBean bean = threadInfos.get(thread.getThreadId());
if (bean == null) {
bean = new ThreadInfoBean();
bean.setId(thread.getThreadId());
bean.setName(thread.getThreadName());
threadInfos.put(bean.getId(), bean);
} else threadIds.remove(bean.getId());
bean.setCpuTime(tmxb.getThreadCpuTime(bean.getId()));
bean.setState(thread.getThreadState().name());
if (thread.getThreadState() == State.BLOCKED)
bean.setState(
bean.getState()
+ " by '"
+ thread.getLockOwnerName()
+ "' ("
+ thread.getLockOwnerId()
+ ")");
bean.setStackTrace(thread.getStackTrace());
beans.add(bean);
}
// Remove unreferenced threads
for (Long id : threadIds) threadInfos.remove(id);
result.addData("threads", beans);
return result;
}
}
/**
* @param t Thread
* @param pw PrintWriter
*/
public static void reportThread(Thread t, PrintWriter pw) {
ThreadMXBean tmxb = ManagementFactory.getThreadMXBean();
ThreadInfo info = tmxb.getThreadInfo(t.getId());
pw.print("Java Thread State: ");
pw.println(info.getThreadState());
pw.print("Blocked/Waiting On: ");
if (info.getLockOwnerId() >= 0) {
pw.print(info.getLockName());
pw.print(" which is owned by ");
pw.print(info.getLockOwnerName());
pw.print("(");
pw.print(info.getLockOwnerId());
pw.println(")");
} else {
pw.println("NONE");
}
StackTraceElement[] ste = t.getStackTrace();
for (int i = 0; i < ste.length; i++) {
pw.print(" ");
pw.print(ste[i].toString());
pw.println();
}
}
private void printThread() {
long now = System.currentTimeMillis();
long diffLastThreadDump = now - lastThreadDump;
logger.info("diffLastThreadDump:" + diffLastThreadDump);
if (diffLastThreadDump > 60000) {
logger.info("had not sent all threads for a while.. will do so now");
lastThreadDump = now;
try {
ThreadMXBean t = ManagementFactory.getThreadMXBean();
long threads[] = t.getAllThreadIds();
ThreadInfo[] tinfo = t.getThreadInfo(threads, 40);
StringBuilder sb = new StringBuilder("All Threads");
for (int i = 0; i < tinfo.length; i++) {
ThreadInfo e = tinfo[i];
try {
StackTraceElement[] el = e.getStackTrace();
sb.append(
"\n\n"
+ e.getThreadName()
+ "\n"
+ " "
+ " Thread id = "
+ e.getThreadId()
+ " "
+ e.getThreadState());
if (e.getThreadState().equals(State.BLOCKED)) {
sb.append(
"\n\nBlocked info: "
+ e.getBlockedCount()
+ ":"
+ e.getBlockedTime()
+ ":"
+ e.getLockName()
+ ":"
+ e.getLockOwnerId()
+ ":"
+ e.getLockOwnerName()
+ "\n"
+ " "
+ " Thread id = "
+ e.getThreadId()
+ " "
+ e.getThreadState());
ThreadInfo eBlockedThread = t.getThreadInfo(e.getLockOwnerId(), 40);
StackTraceElement[] elBlockedThread = eBlockedThread.getStackTrace();
sb.append(
"\n\n "
+ e.getThreadName()
+ "\n"
+ " "
+ " Thread id = "
+ eBlockedThread.getThreadId()
+ " "
+ eBlockedThread.getThreadState());
if (elBlockedThread == null || elBlockedThread.length == 0) {
sb.append(" no stack trace available");
} else {
for (int n = 0; n < elBlockedThread.length; n++) {
if (n != 0) sb.append("\n");
StackTraceElement frame = elBlockedThread[n];
if (frame == null) {
sb.append(" null stack frame");
continue;
}
sb.append(" ");
sb.append(frame.toString());
}
}
}
if (el == null || el.length == 0) {
sb.append(" no stack trace available");
continue;
}
for (int n = 0; n < el.length; n++) {
if (n != 0) sb.append("\n");
StackTraceElement frame = el[n];
if (frame == null) {
sb.append(" null stack frame");
continue;
}
sb.append(" ");
sb.append(frame.toString());
}
} catch (Exception e2) {
}
}
String warningEmailReceiver = CmsPropertyHandler.getWarningEmailReceiver();
if (warningEmailReceiver != null
&& !warningEmailReceiver.equals("")
&& warningEmailReceiver.indexOf("@warningEmailReceiver@") == -1) {
try {
logger.info("Mailing..");
MailServiceFactory.getService()
.sendEmail(
CmsPropertyHandler.getMailContentType(),
warningEmailReceiver,
warningEmailReceiver,
null,
null,
null,
null,
message,
sb.toString().replaceAll("\n", "<br/>"),
"utf-8");
} catch (Exception e) {
logger.error("Could not send mail:" + e.getMessage(), e);
}
}
} catch (Throwable e) {
logger.error("Error generating message:" + e.getMessage(), e);
}
}
// Only sends if the last stack was sent more than 3 seconds ago.
if ((now - lastSentTimer) > 10000) {
lastSentTimer = System.currentTimeMillis();
StackTraceElement[] el = targetThread.getStackTrace();
ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean();
long stopTimeInNs = threadMXBean.getThreadUserTime(targetThread.getId());
long diff = (stopTimeInNs - startTimeInNs) / 1000000000;
StringBuffer stackString = new StringBuffer("\n\n" + message + "\n\n");
stackString.append("ServerName: " + getServerName() + "\n");
stackString.append("Maximum memory (MB): " + (maxMemory / 1024 / 1024) + "\n");
stackString.append("Used memory (MB): " + ((totalMemory - freeMemory) / 1024 / 1024) + "\n");
stackString.append("Free memory (MB): " + (freeMemory / 1024 / 1024) + "\n");
stackString.append("Total memory (MB): " + (totalMemory / 1024 / 1024) + "\n");
stackString.append("Number of current requests: " + numberOfCurrentRequests + "\n");
stackString.append("Number of active requests: " + numberOfActiveRequests + "\n");
stackString.append("Number of long requests: " + longThreadMonitorsSize + "\n");
stackString.append("Current thread time: " + diff + " seconds\n");
stackString.append(
"Average time: " + RequestAnalyser.getRequestAnalyser().getAverageElapsedTime() + "\n");
stackString.append(
"Longest time: " + RequestAnalyser.getRequestAnalyser().getMaxElapsedTime() + "\n");
stackString.append("Original url: " + getOriginalFullURL() + "\n");
stackString.append("UserInfo: " + getUserInfo() + "\n");
stackString.append("--------------------------------------------\n\n");
stackString.append("Thread with id [" + targetThread.getId() + "] at report time:\n");
if (el != null && el.length != 0) {
for (int j = 0; j < el.length; j++) {
StackTraceElement frame = el[j];
if (frame == null) stackString.append(" null stack frame" + "\n");
else stackString.append(" ").append(frame.toString()).append("\n");
// if((stackString.indexOf("infoglue") > -1 && j > 20) || j > 35)
// break;
}
}
if (targetThread.getState().equals(State.BLOCKED)) {
ThreadMXBean t = ManagementFactory.getThreadMXBean();
ThreadInfo e = t.getThreadInfo(targetThread.getId(), 40);
stackString.append(
"\n\nBlocked info: "
+ e.getBlockedCount()
+ ":"
+ e.getBlockedTime()
+ ":"
+ e.getLockName()
+ ":"
+ e.getLockOwnerId()
+ ":"
+ e.getLockOwnerName()
+ "\n"
+ " "
+ " Thread id = "
+ e.getThreadId()
+ " "
+ e.getThreadState());
ThreadInfo eBlockedThread = t.getThreadInfo(e.getLockOwnerId(), 40);
StackTraceElement[] elBlockedThread = eBlockedThread.getStackTrace();
stackString.append(
"\n\nBlocked thread: "
+ e.getThreadName()
+ "\n"
+ " "
+ " Thread id = "
+ eBlockedThread.getThreadId()
+ " "
+ eBlockedThread.getThreadState());
if (elBlockedThread == null || elBlockedThread.length == 0) {
stackString.append(" no stack trace available");
} else {
for (int n = 0; n < elBlockedThread.length; n++) {
if (n != 0) stackString.append("\n");
StackTraceElement frame = elBlockedThread[n];
if (frame == null) {
stackString.append(" null stack frame");
continue;
}
stackString.append(" ");
stackString.append(frame.toString());
}
}
}
stackString.append(
"\n\n**********************************\nConcurrent long threads (Only an excerpt of all)\n**********************************");
ThreadMXBean t = ManagementFactory.getThreadMXBean();
List threadMonitors = RequestAnalyser.getLongThreadMonitors();
Iterator threadMonitorsIterator = threadMonitors.iterator();
int threadCount = 0;
while (threadMonitorsIterator.hasNext() && threadCount < 5) {
SimpleThreadMonitor tm = (SimpleThreadMonitor) threadMonitorsIterator.next();
if (targetThread.getId() == tm.getThreadId()) continue;
long threads[] = {tm.getThreadId()};
ThreadInfo[] tinfo = t.getThreadInfo(threads, 40);
stackString
.append("\n\n---------------------------------\nConcurrent long thread [")
.append(tm.getThreadId())
.append("]:\n");
stackString
.append("Elapsed time:")
.append(tm.getElapsedTime())
.append("\n Thread id: ")
.append(tm.getThreadId())
.append("\n Original url: ")
.append(tm.getOriginalFullURL())
.append(")");
for (int i = 0; i < tinfo.length; i++) {
ThreadInfo e = tinfo[i];
el = e.getStackTrace();
if (el != null && el.length != 0) {
for (int n = 0; n < el.length; n++) {
StackTraceElement frame = el[n];
if (frame == null) stackString.append(" null stack frame\n");
else stackString.append(" null stack frame").append(frame.toString()).append("\n");
}
}
}
threadCount++;
}
logger.warn(stackString);
} else {
logger.warn(
"A thread took to long but the system seems to be really clogged so we don't send this one.");
}
}
// ThreadInfo.toString() truncates the stack trace by first 8, so needed my own version
@IgnoreJRERequirement
public static String dumpThreadInfo(ThreadInfo ti) {
StringBuilder sb =
new StringBuilder(
"\""
+ ti.getThreadName()
+ "\""
+ " Id="
+ ti.getThreadId()
+ " "
+ ti.getThreadState());
if (ti.getLockName() != null) {
sb.append(" on " + ti.getLockName());
}
if (ti.getLockOwnerName() != null) {
sb.append(" owned by \"" + ti.getLockOwnerName() + "\" Id=" + ti.getLockOwnerId());
}
if (ti.isSuspended()) {
sb.append(" (suspended)");
}
if (ti.isInNative()) {
sb.append(" (in native)");
}
sb.append('\n');
StackTraceElement[] stackTrace = ti.getStackTrace();
for (int i = 0; i < stackTrace.length; i++) {
StackTraceElement ste = stackTrace[i];
sb.append("\tat " + ste.toString());
sb.append('\n');
if (i == 0 && ti.getLockInfo() != null) {
Thread.State ts = ti.getThreadState();
switch (ts) {
case BLOCKED:
sb.append("\t- blocked on " + ti.getLockInfo());
sb.append('\n');
break;
case WAITING:
sb.append("\t- waiting on " + ti.getLockInfo());
sb.append('\n');
break;
case TIMED_WAITING:
sb.append("\t- waiting on " + ti.getLockInfo());
sb.append('\n');
break;
default:
}
}
for (MonitorInfo mi : ti.getLockedMonitors()) {
if (mi.getLockedStackDepth() == i) {
sb.append("\t- locked " + mi);
sb.append('\n');
}
}
}
LockInfo[] locks = ti.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();
}