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Posted to dev@qpid.apache.org by "Aidan Skinner (JIRA)" <qp...@incubator.apache.org> on 2007/10/09 14:24:50 UTC
[jira] Updated: (QPID-626) AMQSession deadlocks
[ https://issues.apache.org/jira/browse/QPID-626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Aidan Skinner updated QPID-626:
-------------------------------
Attachment: QPID-626.patch
Problem was due to lock-ordering, while it was consistent in AMQSession, FailoverHandler.run acquires the mutex before eventually calling AMQSession.closed(), resulting in the deadlock.
> AMQSession deadlocks
> --------------------
>
> Key: QPID-626
> URL: https://issues.apache.org/jira/browse/QPID-626
> Project: Qpid
> Issue Type: Bug
> Affects Versions: M2
> Reporter: Aidan Skinner
> Fix For: M2, M2.1, M3
>
> Attachments: QPID-626.patch
>
>
> Ocassionally AMQSession can deadlock due to misordered lock acquisition eg. in org.apache.qpid.test.unit.basic.LargeMessageTest
> Java stack information for the threads listed above:
> ===================================================
> "Failover":
> at org.apache.qpid.client.AMQSession.closed(AMQSession.java:582)
> - waiting to lock <0x00002aaae86a40c0> (a java.lang.Object)
> at org.apache.qpid.client.AMQConnection.closeAllSessions(AMQConnection.java:872)
> at org.apache.qpid.client.AMQConnection.exceptionReceived(AMQConnection.java:1152)
> at org.apache.qpid.client.failover.FailoverHandler.run(FailoverHandler.java:180)
> - locked <0x00002aaae86976f0> (a java.lang.Object)
> at java.lang.Thread.run(Thread.java:619)
> "Dispatcher-Channel-1":
> at org.apache.qpid.client.AMQSession.createTextMessage(AMQSession.java:1134)
> - waiting to lock <0x00002aaae86976f0> (a java.lang.Object)
> at org.apache.qpid.client.AMQSession.createTextMessage(AMQSession.java:1143)
> at org.apache.qpid.test.unit.client.forwardall.Service.onMessage(Service.java:59)
> at org.apache.qpid.client.BasicMessageConsumer.notifyMessage(BasicMessageConsumer.java:650)
> at org.apache.qpid.client.BasicMessageConsumer.notifyMessage(BasicMessageConsumer.java:609)
> at org.apache.qpid.client.AMQSession$Dispatcher.dispatchMessage(AMQSession.java:2778)
> at org.apache.qpid.client.AMQSession$Dispatcher.run(AMQSession.java:2702)
> - locked <0x00002aaae86a40c0> (a java.lang.Object)
> - locked <0x00002aaae86b6a78> (a java.lang.Object)
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