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From "Rob Davies (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (AMQ-1818) transport deadlock attempting to shutdown the broker
Date Tue, 23 Sep 2008 06:56:52 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-1818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rob Davies resolved AMQ-1818.
-----------------------------

    Resolution: Fixed

Fixed by SVN revision 698103

> transport deadlock attempting to shutdown the broker
> ----------------------------------------------------
>
>                 Key: AMQ-1818
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1818
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Transport
>    Affects Versions: 5.1.0
>         Environment: Red Hat Desktop release 4 (Nahant Update 4)
> Linux ecbuild-lin1 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:27:17 EDT 2006 i686 i686 i386
GNU/Linux
> ActiveMQ 5.1.0
>            Reporter: Scott Stanton
>            Assignee: Rob Davies
>             Fix For: 5.3.0
>
>
> While attempting to shutdown a JVM with an embedded broker listening on a stomp+ssl port,
I ran into the following deadlock:
> {code}
> Found one Java-level deadlock:
> =============================
> "ActiveMQ Transport: ssl:///127.0.0.1:43713":
>   waiting to lock monitor 0x8d587f70 (object 0x9b8362b0, a java.lang.Object),
>   which is held by "BrokerService"
> "BrokerService":
>   waiting to lock monitor 0x08901314 (object 0x9b8527b0, a java.lang.Object),
>   which is held by "ActiveMQ Transport: ssl:///127.0.0.1:43713"
> Java stack information for the threads listed above:
> ===================================================
> "ActiveMQ Transport: ssl:///127.0.0.1:43713":
> 	at org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:40)
> 	- waiting to lock <0x9b8362b0> (a java.lang.Object)
> 	at org.apache.activemq.broker.TransportConnection.dispatch(TransportConnection.java:1188)
> 	at org.apache.activemq.broker.TransportConnection.processDispatch(TransportConnection.java:776)
> 	at org.apache.activemq.broker.TransportConnection.dispatchSync(TransportConnection.java:735)
> 	at org.apache.activemq.broker.TransportConnection$1.onCommand(TransportConnection.java:182)
> 	at org.apache.activemq.transport.TransportFilter.onCommand(TransportFilter.java:68)
> 	at org.apache.activemq.transport.InactivityMonitor.onCommand(InactivityMonitor.java:206)
> 	- locked <0x9b852bb0> (a org.apache.activemq.transport.InactivityMonitor$1)
> 	at org.apache.activemq.transport.stomp.StompTransportFilter.sendToActiveMQ(StompTransportFilter.java:80)
> 	- locked <0x9b8527b0> (a java.lang.Object)
> 	at org.apache.activemq.transport.stomp.ProtocolConverter.sendToActiveMQ(ProtocolConverter.java:134)
> 	at org.apache.activemq.transport.stomp.ProtocolConverter.onStompUnsubscribe(ProtocolConverter.java:424)
> 	at org.apache.activemq.transport.stomp.ProtocolConverter.onStompCommad(ProtocolConverter.java:184)
> 	at org.apache.activemq.transport.stomp.StompTransportFilter.onCommand(StompTransportFilter.java:70)
> 	at org.apache.activemq.transport.TransportSupport.doConsume(TransportSupport.java:84)
> 	at org.apache.activemq.transport.tcp.SslTransport.doConsume(SslTransport.java:104)
> 	at org.apache.activemq.transport.tcp.TcpTransport.doRun(TcpTransport.java:196)
> 	at org.apache.activemq.transport.tcp.TcpTransport.run(TcpTransport.java:183)
> 	at java.lang.Thread.run(Thread.java:619)
> "BrokerService":
> 	at org.apache.activemq.transport.stomp.StompTransportFilter.sendToActiveMQ(StompTransportFilter.java:80)
> 	- waiting to lock <0x9b8527b0> (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:550)
> 	at org.apache.activemq.transport.stomp.StompTransportFilter.oneway(StompTransportFilter.java:59)
> 	at org.apache.activemq.transport.InactivityMonitor.oneway(InactivityMonitor.java:233)
> 	- locked <0x9b857d50> (a java.util.concurrent.atomic.AtomicBoolean)
> 	at org.apache.activemq.transport.MutexTransport.oneway(MutexTransport.java:40)
> 	- locked <0x9b8362b0> (a java.lang.Object)
> 	at org.apache.activemq.broker.TransportConnection.dispatch(TransportConnection.java:1188)
> 	at org.apache.activemq.broker.TransportConnection.processDispatch(TransportConnection.java:776)
> 	at org.apache.activemq.broker.TransportConnection.iterate(TransportConnection.java:813)
> 	at org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:122)
> 	at org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:43)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
> 	at java.lang.Thread.run(Thread.java:619)
> Found 1 deadlock.
> {code}

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