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https://issues.apache.org/jira/browse/AMQ-4231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13535146#comment-13535146
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Timothy Bish commented on AMQ-4231:
-----------------------------------
Patch is lacking any unit tests which would prevent the fixes from being
protected into the future plus serve as a demonstration of the possible problem.
> RWLock in queue does not used properly - performance improvement
> ----------------------------------------------------------------
>
> Key: AMQ-4231
> URL: https://issues.apache.org/jira/browse/AMQ-4231
> Project: ActiveMQ
> Issue Type: Improvement
> Components: Broker
> Affects Versions: 5.4.2, 5.7.0
> Environment: fedora15; ubuntu 12.10; debian; probably independent
> Reporter: Tomáš Martinec
> Priority: Minor
> Labels: locks, performance,, queue,, synchronization,
> Attachments: unsynchronizing-cursors.diff
>
>
> The full story is in the user forum under title:
> Activemq 5.4.2 hangs when the temp disk usage is used
> The advantage of RW locks in Queue class is not used much. The cursors
> objects are synchronized, so the readers cannot access the queued messages
> concurrently.
> The fixing effort of this issue may not be worth it, but you may consider
> this issue during fixing related issues.
>
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