[jboss-jira] [JBoss JIRA] Commented: (JBMESSAGING-809) Extra message created if server fails right after send is completed

[Clebert Suconic (JIRA)]

    [ http://jira.jboss.com/jira/browse/JBMESSAGING-809?page=comments#action_12354384 ] 
            
Clebert Suconic commented on JBMESSAGING-809:
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This task was about fixing FailoverTest::testFailureRightAfterSend

As a fix, we are double checking if ACKs were previously ACKed (not throwing exceptions if they were already ACKed)
or verifying if the message was already included, by checking if the message was already included, with an extra select during failover.

However, a complete fix for this would be JBMESSAGING-815 and JBMESSAGING-604

> Extra message created if server fails right after send is completed
> -------------------------------------------------------------------
>
>                 Key: JBMESSAGING-809
>                 URL: http://jira.jboss.com/jira/browse/JBMESSAGING-809
>             Project: JBoss Messaging
>          Issue Type: Bug
>    Affects Versions: 1.2.0.Beta2
>            Reporter: Clebert Suconic
>         Assigned To: Clebert Suconic
>            Priority: Critical
>             Fix For: 1.2.0.CR1
>
>
> Imagine two threads... producer/consumer...
> If the server crashes when both ACK and send are still coming back from the execution (at the same time)... there is a chance of creating a message.
> I have created MultiThreadFailoverTest::testFailureOnSendReceiveSynchronized for this... But I have seen testMultiThreadFailover failing ocasionally.
> testFailureOnSendReceiveSynchronized poisons the server is a special way to cause the synchronization issue in a predictable way.

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