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Posted to dev@qpid.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2015/03/27 00:44:54 UTC

[jira] [Commented] (QPID-6466) Client may send duplicate basic.rejects (or messageRelease) during consumer close

    [ https://issues.apache.org/jira/browse/QPID-6466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14382961#comment-14382961 ] 

ASF subversion and git services commented on QPID-6466:
-------------------------------------------------------

Commit 1669472 from [~k-wall] in branch 'qpid/trunk'
[ https://svn.apache.org/r1669472 ]

QPID-6466: [Java Client] Avoid possibilty that the dispatcher and IO thread can reject/release the same message during consumer close

> Client may send duplicate basic.rejects (or messageRelease) during consumer close
> ---------------------------------------------------------------------------------
>
>                 Key: QPID-6466
>                 URL: https://issues.apache.org/jira/browse/QPID-6466
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Client
>    Affects Versions: 0.18, 0.22, 0.32
>            Reporter: Keith Wall
>            Assignee: Keith Wall
>            Priority: Minor
>             Fix For: 6.0 [Java]
>
>
> During a MessageConsumer#close() currently the Qpid Client uses both the the IO thread (BasicCancelOkMethodHandler#methodReceive() > AMQProtocolSession#confirmConsumerCancelled() -> ... -> AMQSession#rejectMessagesForConsumerTag()) and the Dispatcher (AMQSession.Dispatcher#notifyConsumer) to return any messages in the pre dispatch queue to the Broker.
> There is a race where both may return the same message, causing a duplicate to be received by the Broker.
> On the 0-8 path with the Java Broker, it is reported like this:
> {noformat}
> 2015-03-26 21:54:58,011 WARN  [IO-/127.0.0.1:52562] (v0_8.AMQChannel) - Dropping reject request as message is null for tag:113
> {noformat}
> Whilst harmless, the log message causes confusion for the user.



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