Philip Harvey created QPID-5118: ----------------------------------- Summary: [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
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. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@qpid.apache.org For additional commands, e-mail: dev-h...@qpid.apache.org