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From "Lorenz Quack (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (QPID-6672) Message dispatching after dispatcher close can cause thread to terminate with IllegalStateException
Date Tue, 18 Aug 2015 13:55:45 GMT

     [ https://issues.apache.org/jira/browse/QPID-6672?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lorenz Quack updated QPID-6672:
-------------------------------
    Attachment: 0001-QPID-6672-Java-Client-Message-dispatching-after-disp_v4.patch

Latest version of my patch.
This is build on *_v2 (e.g., it keeps the messageDeliveryLock)

To fix the reported issue I converted the messageDeliveryLock into an explicit ReentrantLock.
in Dispatcher#dispatchThread() we now tryLock() the messageDeliveryLock in a loop while checking
whether the session is being closed. The rest of the locking semantic are untouched.

This should fix the issue and not introduce new ones. The best of both worlds.

Please review.

> Message dispatching after dispatcher close can cause thread to terminate with IllegalStateException
> ---------------------------------------------------------------------------------------------------
>
>                 Key: QPID-6672
>                 URL: https://issues.apache.org/jira/browse/QPID-6672
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Client
>            Reporter: Keith Wall
>            Priority: Minor
>         Attachments: 0001-QPID-6672-Java-Client-Message-dispatching-after-disp.patch,
0001-QPID-6672-Java-Client-Message-dispatching-after-disp_v2.patch, 0001-QPID-6672-Java-Client-Message-dispatching-after-disp_v3.patch,
0001-QPID-6672-Java-Client-Message-dispatching-after-disp_v4.patch, TEST-org.apache.qpid.test.unit.transacted.TransactionTimeoutTest.testConsumerIdleRollback.txt
>
>
> There is a race between the dispatcher thread and another thread closing a session. 
In the unlucky case, the dispatcher thread can die with an ISE as below.
> The issue appears to be that the Dispatcher#close method does not await the shutdown
for the dispatcher before returning, so the Dispatcher may run on for another iteration whilst
the dispatcher reference has been nulled.
> This appears to be a longstanding issue (the fixme goes back to 2007) and is showing
up now owing to r1693225, which makes uncaught exceptions fail the test.
> {noformat}
> 2015-07-29 18:16:37,498         ERROR [Dispatcher-4-Conn-32] o.a.q.t.LoggingUncaughtExceptionHandler
Uncaught exception in thread "Dispatcher-4-Conn-32"
> java.lang.IllegalStateException: dispatcher is not started
> 	at org.apache.qpid.client.AMQSession.dispatch(AMQSession.java:3267) ~[qpid-client-6.0.0-SNAPSHOT.jar:na]
> 	at org.apache.qpid.client.message.UnprocessedMessage.dispatch(UnprocessedMessage.java:54)
~[qpid-client-6.0.0-SNAPSHOT.jar:na]
> 	at org.apache.qpid.client.AMQSession$Dispatcher.run(AMQSession.java:3408) ~[qpid-client-6.0.0-SNAPSHOT.jar:na]
> 	at java.lang.Thread.run(Thread.java:745) ~[na:1.7.0_67]
> {noformat}



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