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https://issues.apache.org/jira/browse/QPID-5118?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Philip Harvey updated QPID-5118:
--------------------------------
Attachment: jcarder_result_3.dot
JCarder-generated file showing this potential deadlock.
> [JMS] Deadlock when closing a consumer and calling JMS operatons inside
> onMessage() on AMQP 0-8/0-9/0-9-1 connection
> --------------------------------------------------------------------------------------------------------------------
>
> Key: QPID-5118
> URL: https://issues.apache.org/jira/browse/QPID-5118
> Project: Qpid
> Issue Type: Bug
> Components: Java Client
> Affects Versions: 0.22
> Reporter: Philip Harvey
> Attachments: jcarder_result_3.dot
>
>
> I have run the java systests with the [JCarder|http://jcarder.org/] agent
> attached. When using AMQP 0-9, JCarder detected a potential deadlock when the
> following are done concurrently:
> * Close a consumer from an application thread.
> * Call one of the JMS operations inside MessageListener.onMessage() that uses
> AMQConnectionDelegate_8_0.executeRetrySupport(..).
> Here is a sketch of the deadlock scenario:
> {noformat}
> Thread: Dispatcher-1-Conn-600
> AMQSession$Dispatcher.dispatchMessage()
> lock AMQSession.this._messageDeliveryLock
> ...
> myMessageListener.onMessage()
> execute failover-aware operation eg
> createQueue, createProducer etc
>
> AMQConnectionDelegate_8_0.executeRetrySupport
> lock
> AMQConnection.getFailoverMutex()
> Thread: main
> BasicMessageConsumer.close()
> lock AMQSession.getFailoverMutex()
> lock AMQSession._messageDeliveryLock
> {noformat}
>
> Interestingly, AMQConnectionDelegate_0_10.executeRetrySupport(..) does not
> acquire the failover mutex (I have no idea if it _should_) so is not
> susceptible to this deadlock.
> I've attached the GraphViz .dot file that JCarder generated when it detected
> this problem.
> Note that this problem is similar to QPID-4574 so might be fixed by a single
> commit.
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