数以百计的JBoss 5.1系统线程永远等待

时间:2013-08-22 15:57:10

标签: java threadpool jboss5.x

大约3个月前,我们迁移到JBoss 5.1.0.GA,测试几天后,我们在应用程序的日志中发现了几个Out of Memory Errors(OOME)。

然后I found an issue将原因描述为JVM中的错误,直到版本7.我们更新到版本7u25并且我们没有看到更多OOME但现在我看到一个异常巨大的线程数:大约2k个线程其中1.9k是守护程序线程。

在检查我们的监控工具后,我发现它们都是由JBoss系统线程池生成的线程(它们都被命名为JBoss System Threads(1)-XXXX)。这是堆栈跟踪详细信息:

"JBoss System Threads(1)-1649" Id=130217 in WAITING on lock=java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@a4d1d3
    at sun.misc.Unsafe.park(Native Method)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:186)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2043)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1068)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:724)

我还检查了工具中的收集泄漏,并发现了我认为有些相关的下一个数据:

Collection Leak Info

我已经检查了JBoss JIRA,但没有找到相关的东西。

有人能指出我发生了什么吗?

更新:

这是jboss-service.xml中的线程池配置

<!-- A Thread pool service -->
   <mbean code="org.jboss.util.threadpool.BasicThreadPool"
      name="jboss.system:service=ThreadPool">
      <attribute name="Name">JBoss System Threads</attribute>
      <attribute name="ThreadGroupName">System Threads</attribute>
      <!-- How long a thread will live without any tasks in MS -->
      <attribute name="KeepAliveTime">60000</attribute>
      <!-- The max number of threads in the pool -->
      <attribute name="MaximumPoolSize">3200</attribute>
      <!-- The max number of tasks before the queue is full -->
      <attribute name="MaximumQueueSize">3200</attribute>
      <!-- The behavior of the pool when a task is added and the queue is full.
      abort - a RuntimeException is thrown
      run - the calling thread executes the task
      wait - the calling thread blocks until the queue has room
      discard - the task is silently discarded without being run
      discardOldest - check to see if a task is about to complete and enque
         the new task if possible, else run the task in the calling thread
      -->
      <attribute name="BlockingMode">run</attribute>
   </mbean>

1 个答案:

答案 0 :(得分:1)

线程是由池创建的,因为运行服务器的Java版本不兼容。我们切换到早期版本,问题就消失了。