[
https://issues.apache.org/jira/browse/QPID-5119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Rob Godfrey resolved QPID-5119.
-------------------------------
Resolution: Fixed
Fix Version/s: 0.31
This issue should be resolved by QPID-6374
> [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
> Fix For: 0.31
>
> 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 was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
