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Posted to dev@qpid.apache.org by "Robbie Gemmell (JIRA)" <ji...@apache.org> on 2010/11/07 15:58:06 UTC
[jira] Commented: (QPID-2931) nulling the MessageReference handle
on the Message during QueueEntry disposal can result in NPE
[ https://issues.apache.org/jira/browse/QPID-2931?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12929343#action_12929343 ]
Robbie Gemmell commented on QPID-2931:
--------------------------------------
Removed used of the AtomicReferenceUpdater to null/retrieve the entry during release, and replaced with a guarding AtomicBoolean to ensure the continued once-only effect of onRelease() when releasing the MessageReference.
> nulling the MessageReference handle on the Message during QueueEntry disposal can result in NPE
> -----------------------------------------------------------------------------------------------
>
> Key: QPID-2931
> URL: https://issues.apache.org/jira/browse/QPID-2931
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Affects Versions: 0.6
> Reporter: Robbie Gemmell
> Assignee: Robbie Gemmell
> Priority: Critical
> Fix For: 0.7
>
>
> Nulling the MessageReference handle on the Message during QueueEntry disposal can result in NPE in various places throughout the broker, when attempts from seperate areas of the broker to retrieve details that are held only in the Message overlap the reference update and encounter unexpected NPE's. The reference nulling should be removed until this can be accounted for. (It is no longer as necessary as it once was, thanks to more aggressive QueueEntry scavenging in the QueueEntryList)
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