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From "William Leibzon (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-1059) ActiveMQ Task/Transport Deadlock when using Stomp
Date Fri, 17 Nov 2006 21:46:02 GMT
ActiveMQ Task/Transport Deadlock when using Stomp
-------------------------------------------------

                 Key: AMQ-1059
                 URL: https://issues.apache.org/activemq/browse/AMQ-1059
             Project: ActiveMQ
          Issue Type: Bug
          Components: Transport
    Affects Versions: 4.0.2
         Environment: Linux Redhat EL3, Java 1.4.2
            Reporter: William Leibzon


This happened after about a day running monitoring script that uses Perl stomp client to connect
to JMS.

Found one Java-level deadlock:
=============================
"ActiveMQ Task":
  waiting to lock monitor 0x0807ae74 (object 0x7ee3a898, a java.lang.Object),
  which is held by "ActiveMQ Transport: tcp:///10.1.111.14:60270"
"ActiveMQ Transport: tcp:///10.1.111.14:60270":
  waiting to lock monitor 0x0807b474 (object 0x7ee3caa8, a java.lang.Object),
  which is held by "ActiveMQ Task"

Java stack information for the threads listed above:
===================================================
"ActiveMQ Task":
        at org.apache.activemq.transport.stomp.StompTransportFilter.sendToActiveMQ(StompTransportFilter.java:70)
        - waiting to lock <0x7ee3a898> (a java.lang.Object)
        at org.apache.activemq.transport.stomp.StompSubscription.onMessageDispatch(StompSubscription.java:71)
        at org.apache.activemq.transport.stomp.ProtocolConverter.onActiveMQCommad(ProtocolConverter.java:476)
        at org.apache.activemq.transport.stomp.StompTransportFilter.oneway(StompTransportFilter.java:52)
        at org.apache.activemq.transport.InactivityMonitor.oneway(InactivityMonitor.java:142)
        at org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:45)
        - locked <0x7ee3caa8> (a java.lang.Object)
        at org.apache.activemq.transport.ResponseCorrelator.oneway(ResponseCorrelator.java:59)
        at org.apache.activemq.broker.TransportConnection.dispatch(TransportConnection.java:215)
        at org.apache.activemq.broker.AbstractConnection.processDispatch(AbstractConnection.java:722)
        at org.apache.activemq.broker.AbstractConnection.iterate(AbstractConnection.java:738)
        at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:111)
        at org.apache.activemq.thread.PooledTaskRunner.access$100(PooledTaskRunner.java:26)
        at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:44)
        at edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
        at java.lang.Thread.run(Unknown Source)
"ActiveMQ Transport: tcp:///10.1.111.14:60270":
        at org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:45)
        - waiting to lock <0x7ee3caa8> (a java.lang.Object)
        at org.apache.activemq.transport.ResponseCorrelator.oneway(ResponseCorrelator.java:59)
        at org.apache.activemq.broker.TransportConnection.dispatch(TransportConnection.java:215)
        at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:63)
        at org.apache.activemq.transport.ResponseCorrelator.onCommand(ResponseCorrelator.java:92)
        at org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:67)
        at org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:123)
        at org.apache.activemq.transport.stomp.StompTransportFilter.sendToActiveMQ(StompTransportFilter.java:70)
        - locked <0x7ee3a898> (a java.lang.Object)
        at org.apache.activemq.transport.stomp.ProtocolConverter.sendToActiveMQ(ProtocolConverter.java:112)
        at org.apache.activemq.transport.stomp.ProtocolConverter.onStompSend(ProtocolConverter.java:197)
        at org.apache.activemq.transport.stomp.ProtocolConverter.onStompCommad(ProtocolConverter.java:132)
        at org.apache.activemq.transport.stomp.StompTransportFilter.onCommand(StompTransportFilter.java:60)
        at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:88)
        at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:137)
        at java.lang.Thread.run(Unknown Source)

Found 12 deadlocks

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