标签: thread-dump

有没有从Tomcat 采取线程转储.我想在特定时间监视Tomcat上正在运行的线程.

注意:我在Web逻辑上这样做,但我不知道如何在Tomcat上完成它.

如何在与MONO一起运行的挂起应用程序中显示线程(stacktraces)？

我知道我可以使用Managed Stack Explorer(MSE)在.NET中完成它.因为应用程序仅与MONO挂起,我需要使用MONO.

或者还有其他想法如何找到悬挂的地方？

我想得到在jboss服务器上运行的我的Web应用程序的线程转储.

我找到了两个解决我问题的方法:

• 使用unix命令:kill -3
• 使用JDK中存在的jstack工具.

谁能向我解释这两种方法之间的区别？

提前致谢 !

最近我们的一个生产tomcat服务器没有响应,因为tomcat的繁忙线程高达200.当我们在重新启动之前进行线程转储时,我们在TIMED_WAITING状态下获得了100个线程,就像这3个线程一样:

""http-bio-7007"-exec-241" daemon prio=10 tid=0x00002aaab107b000 nid=0x59df waiting on condition [0x0000000051239000]
java.lang.Thread.State: TIMED_WAITING (parking)
   at sun.misc.Unsafe.park(Native Method)
   - parking to wait for  <0x0000000580d877d0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
   at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
   at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)
   at java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:424)
   at org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:86)
   at org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:32)
   at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:945)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
   at java.lang.Thread.run(Thread.java:662)

""http-bio-7007"-exec-237" daemon prio=10 tid=0x00002aaab186e000 nid=0x596d waiting on condition [0x000000004d1f9000]
java.lang.Thread.State: TIMED_WAITING (parking)
   at sun.misc.Unsafe.park(Native Method)
   - parking to wait for  <0x0000000580d877d0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
   at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:198)
   at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2025)
   at java.util.concurrent.LinkedBlockingQueue.poll(LinkedBlockingQueue.java:424)
   at org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:86)
   at org.apache.tomcat.util.threads.TaskQueue.poll(TaskQueue.java:32)
   at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:945)
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
   at java.lang.Thread.run(Thread.java:662)

""http-bio-7007"-exec-236" …

我的tomcat应用程序服务器中的线程数每天都在增长.

当我采用线程转储进行分析时.

我发现在430个线程中有307个线程处于此状态.

样本堆栈跟踪

"pool-283-thread-1" #2308674 prio=5 os_prio=0 tid=0x000000000a916800 nid=0x1101 waiting on condition [0x00002aec87f17000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000006d9929ec0> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

   Locked ownable synchronizers:
    - None

"pool-282-thread-1" #2307106 prio=5 os_prio=0 tid=0x000000000a4fb000 nid=0x78e3 waiting on condition [0x00002aec87e16000]
   java.lang.Thread.State: WAITING (parking)
    at sun.misc.Unsafe.park(Native Method)
    - parking to wait for  <0x00000006d8ca7bf8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at …

调试java.lang.OutOfMemoryError异常的最佳方法是什么？

当我们的应用程序发生这种情况时,我们的应用服务器(Weblogic)会生成堆转储文件.我们应该使用堆转储文件吗？我们应该生成Java线程转储吗？究竟有什么区别？

更新:生成线程转储的最佳方法是什么？是kill -3(我们的应用程序在Solaris上运行)杀死应用程序并生成线程转储的最佳方法吗？有没有办法生成线程转储但不杀死应用程序？

我在tomcat上运行基于Java EE的应用程序,我看到应用程序在运行几个小时后突然挂起.

我在应用程序挂起之前从应用程序中收集了线程转储并将其放入TDA进行分析:

TDA(线程转储分析器)为上述监视器提供以下消息:

A lot of threads are waiting for this monitor to become available again.
This might indicate a congestion. You also should analyze other locks 
blocked by threads waiting for this monitor as there might be much more 
threads waiting for it.

这是上面突出显示的线程的堆栈跟踪:

"MY_THREAD" prio=10 tid=0x00007f97f1918800 nid=0x776a 
             waiting for monitor entry [0x00007f9819560000]
   java.lang.Thread.State: BLOCKED (on object monitor)
    at java.util.Hashtable.get(Hashtable.java:356)
    - locked <0x0000000680038b68> (a java.util.Properties)
    at java.util.Properties.getProperty(Properties.java:951)
    at java.lang.System.getProperty(System.java:709)
    at com.MyClass.myMethod(MyClass.java:344)

我想知道"waiting for monitor entry"国家意味着什么？并且也会感谢任何帮助我调试此问题的指针.

有一个类似的问题问java-thread-dump-waiting-on-object-monitor-line-not-follow-by-waiting-on,但是没有具体的答案,所以我会问我的问题,希望得到更多信息...

在下面的线程转储中,我看到线程处于"WAITING(在对象监视器上)"状态 - 但是没有"等待"的行指示它正在等待的内容.如何解释此线程堆栈并找出此线程正在等待的原因(以及什么资源)？

"eventTaskExecutor-50" prio=10 tid=0x0000000004117000 nid=0xd8dd in Object.wait() [0x00007f8f457ad000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
at java.lang.Object.wait(Object.java:503)
at com.tibco.tibjms.TibjmsxLink.sendRequest(TibjmsxLink.java:359)
- locked <0x00007f98cbebe5d8> (a com.tibco.tibjms.TibjmsxResponse)
at com.tibco.tibjms.TibjmsxSessionImp._confirmTransacted(TibjmsxSessionImp.java:2934)
at com.tibco.tibjms.TibjmsxSessionImp._confirm(TibjmsxSessionImp.java:3333)
- locked <0x00007f90101399b8> (a java.lang.Object)
at com.tibco.tibjms.TibjmsxSessionImp._commit(TibjmsxSessionImp.java:2666)
at com.tibco.tibjms.TibjmsxSessionImp.commit(TibjmsxSessionImp.java:4516)
at org.springframework.jms.support.JmsUtils.commitIfNecessary(JmsUtils.java:217)
at org.springframework.jms.listener.AbstractMessageListenerContainer.commitIfNecessary(AbstractMessageListenerContainer.java:577)
at org.springframework.jms.listener.AbstractMessageListenerContainer.doExecuteListener(AbstractMessageListenerContainer.java:482)
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.doReceiveAndExecute(AbstractPollingMessageListenerContainer.java:325)
at org.springframework.jms.listener.AbstractPollingMessageListenerContainer.receiveAndExecute(AbstractPollingMessageListenerContainer.java:263)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.invokeListener(DefaultMessageListenerContainer.java:1102)
at org.springframework.jms.listener.DefaultMessageListenerContainer$AsyncMessageListenerInvoker.run(DefaultMessageListenerContainer.java:996)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:722)

Locked ownable synchronizers:
- <0x00007f901011ca88> (a java.util.concurrent.ThreadPoolExecutor$Worker)

此线程是配置为接受来自Tibco总线的消息的侦听器线程之一.

谢谢!

码头

在应用程序线程转储中,我可以看到有五个线程的线程池,如下所示

"pool-1-thread-5" prio=10 tid=0x000000000101a000 nid=0xe1f in Object.wait() [0x00007f3c66086000]
  java.lang.Thread.State: WAITING (on object monitor)
    at java.lang.Object.wait(Native Method)
    - waiting on <0x00000007b8e57af8> (a hidden.edu.emory.mathcs.backport.java.util.concurrent.LinkedBlockingQueue$SerializableLock)
    at java.lang.Object.wait(Object.java:503)
    at hidden.edu.emory.mathcs.backport.java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:316)
    - locked <0x00000007b8e57af8> (a hidden.edu.emory.mathcs.backport.java.util.concurrent.LinkedBlockingQueue$SerializableLock)
    at hidden.edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:994)
    at hidden.edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1054)
    at hidden.edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:575)
    at java.lang.Thread.run(Thread.java:722)

但我没有直接使用这样的东西,并没有在依赖中看到这样的东西.

这是什么(hidden.edu.emory.mathcs.backport)及其使用的原因(在jdk 7上运行的应用程序)？我可以检测应用程序的哪个部分启动它？

我是Heaps的新手,任何人都可以建议我如何对任何java进程(如Jmeter)进行堆转储.我读到了关于jmap命令,但我没有得到执行/编写它的地方和方式(在eclipse或cmd中).这可能是一个非常基本的问题,但仍然需要建议.我可以从任何地方下载jmap.exe和jhat.exe吗？谢谢