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https://issues.apache.org/jira/browse/QPID-6268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14244211#comment-14244211
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ASF subversion and git services commented on QPID-6268:
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Commit 1644906 from [~godfrer] in branch 'qpid/trunk'
[ https://svn.apache.org/r1644906 ]
QPID-6268 : [Java Broker] increment/decrement the unacknowledge count on the
queue precisely when the queue entry changes state
> Broker statistic Queue#unacknowledgedMessages is maintained incorrectly when
> the client rolls-back a session with unacknowledged messages
> -----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: QPID-6268
> URL: https://issues.apache.org/jira/browse/QPID-6268
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Affects Versions: 0.22, 0.24, 0.26, 0.28, 0.30
> Reporter: Keith Wall
> Assignee: Keith Wall
>
> The Broker statistic Queue#unacknowledgedMessages (named "Pre-fetched" on the
> Queue tab in the Management UI) is incorrectly maintained in the event of a
> client rollback if the client has one or more unacknowledged messages.
> The defect can be demonstrated using the Python client, where a sequence of
> receive message, rollback and receive same message and commit on a transacted
> session, will leave a erroneous Queue#unacknowledgedMessages of 1.
> It is not yet clear if the issue is also reproducible from the Qpid JMS
> Client 0-8..0-91 as this client explicitly rejects messages (thus avoiding
> the Broker defect).
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