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From "Rob Davies (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (AMQ-1059) ActiveMQ Task/Transport Deadlock when using Stomp
Date Tue, 23 Sep 2008 06:58:52 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-1059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rob Davies resolved AMQ-1059.
-----------------------------

    Resolution: Fixed

Fixed by SVN revision 698103

> 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
>            Assignee: Rob Davies
>             Fix For: 5.3.0
>
>
> 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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