[ https://issues.apache.org/jira/browse/QPID-5119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Philip Harvey updated QPID-5119: -------------------------------- Summary: [JMS] 3-thread deadlock on pre-AMQP-0-10 connection involving messageDeliveryLock, failover mutex and sessionCreationLock (was: Java client - 3-thread deadlock on pre-AMQP-0-10 connection involving messageDeliveryLock, failover mutex and sessionCreationLock) > [JMS] 3-thread deadlock on pre-AMQP-0-10 connection involving > messageDeliveryLock, failover mutex and sessionCreationLock > ------------------------------------------------------------------------------------------------------------------------- > > Key: QPID-5119 > URL: https://issues.apache.org/jira/browse/QPID-5119 > Project: Qpid > Issue Type: Bug > Components: Java Client > Affects Versions: 0.22 > Reporter: Philip Harvey > Attachments: jcarder_result_4.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 Connection.createSession from an application thread. > * Call Connection.createSession inside MessageListener.onMessage(). > Here is a sketch of the deadlock scenario: > {noformat} > "Dispatcher-1-Conn-780" > AMQSession$Dispatcher.dispatchMessage() > lock AMQSession.this._messageDeliveryLock > AMQConnection.createSession() > lock AMQConnection._sessionCreationLock BLOCKED > BY applicationThread1 > "applicationThread1" > AMQConnection.createSession > lock AMQConnection._sessionCreationLock > ... > AMQConnectionDelegate_8_0.executeRetrySupport > lock AMQConnection.getFailoverMutex() > BLOCKED BY applicationThread2 > "applicationThread2" > BasicMessageConsumer.close() > lock AMQSession.getFailoverMutex() > lock AMQSession._messageDeliveryLock BLOCKED BY > Dispatcher-1-Conn-780 > {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 and QPID-5118 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