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Philip Harvey commented on QPID-4574: ------------------------------------- Note that this flagged as a potential deadlock when you run the systests with the JCarder agent attached. I recommend that we run JCarder against the systests again to help check the correctness of the fix. > [JMS] Deadlock involving _failoverMutex and _messageDeliveryLock > ---------------------------------------------------------------- > > Key: QPID-4574 > URL: https://issues.apache.org/jira/browse/QPID-4574 > Project: Qpid > Issue Type: Bug > Components: Java Client > Affects Versions: 0.14, 0.16, 0.18, 0.20 > Reporter: Rajith Attapattu > Assignee: Rajith Attapattu > Labels: deadlock > Fix For: Future > > Attachments: Test_00782235.java > > > This deadlock can manifest when a you have a producer sending messages inside > an onMessage() call, while another thread is either closing the session or > the consumer. > Sending a message inside onMessage() is a common enough pattern, and is used > by intermediaries like Message Bridges, ESB's etc.. > Here is an example stack trace, showing deadlock occuring when closing the > consumer: > {noformat} > "Dispatcher-0-Conn-1": > at > org.apache.qpid.client.BasicMessageProducer.send(BasicMessageProducer.java:309) > - waiting to lock <0x00000000ecfd15a8> (a java.lang.Object) > at Test_00782235$1.onMessage(Test_00782235.java:29) > at > org.apache.qpid.client.BasicMessageConsumer.notifyMessage(BasicMessageConsumer.java:751) > at > org.apache.qpid.client.BasicMessageConsumer_0_10.notifyMessage(BasicMessageConsumer_0_10.java:141) > at > org.apache.qpid.client.BasicMessageConsumer.notifyMessage(BasicMessageConsumer.java:725) > at > org.apache.qpid.client.BasicMessageConsumer_0_10.notifyMessage(BasicMessageConsumer_0_10.java:186) > at > org.apache.qpid.client.BasicMessageConsumer_0_10.notifyMessage(BasicMessageConsumer_0_10.java:54) > at > org.apache.qpid.client.AMQSession$Dispatcher.notifyConsumer(AMQSession.java:3479) > at > org.apache.qpid.client.AMQSession$Dispatcher.dispatchMessage(AMQSession.java:3418) > - locked <0x00000000ecfd16c8> (a java.lang.Object) > - locked <0x00000000ecfd16d8> (a java.lang.Object) > at > org.apache.qpid.client.AMQSession$Dispatcher.access$1000(AMQSession.java:3205) > at org.apache.qpid.client.AMQSession.dispatch(AMQSession.java:3198) > at > org.apache.qpid.client.message.UnprocessedMessage.dispatch(UnprocessedMessage.java:54) > at > org.apache.qpid.client.AMQSession$Dispatcher.run(AMQSession.java:3341) > at java.lang.Thread.run(Thread.java:679) > "main": > at > org.apache.qpid.client.BasicMessageConsumer.close(BasicMessageConsumer.java:598) > - waiting to lock <0x00000000ecfd16c8> (a java.lang.Object) > - locked <0x00000000ecfd15a8> (a java.lang.Object) > at > org.apache.qpid.client.BasicMessageConsumer.close(BasicMessageConsumer.java:558) > at Test_00782235.<init>(Test_00782235.java:62) > at Test_00782235.main(Test_00782235.java:12) > {noformat} -- 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