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From "ASF subversion and git services (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPIDJMS-120) viewer may not see previously updated running/closed state on local queue
Date Mon, 05 Oct 2015 16:10:27 GMT

    [ https://issues.apache.org/jira/browse/QPIDJMS-120?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14943586#comment-14943586
] 

ASF subversion and git services commented on QPIDJMS-120:
---------------------------------------------------------

Commit febb811d93cb2a502b115d9349cfc90ccb610370 in qpid-jms's branch refs/heads/master from
Robert Gemmell
[ https://git-wip-us.apache.org/repos/asf?p=qpid-jms.git;h=febb811 ]

QPIDJMS-120: while in here, make lock field private and final


> viewer may not see previously updated running/closed state on local queue
> -------------------------------------------------------------------------
>
>                 Key: QPIDJMS-120
>                 URL: https://issues.apache.org/jira/browse/QPIDJMS-120
>             Project: Qpid JMS
>          Issue Type: Bug
>          Components: qpid-jms-client
>    Affects Versions: 0.5.0
>            Reporter: Robbie Gemmell
>            Assignee: Robbie Gemmell
>            Priority: Minor
>             Fix For: 0.6.0
>
>
> The client keeps a local queue for messages as they arrive. Most of the methods in the
class synchronize around various state governing the behaviour ot the queue, such as whether
it is 'running' or 'closed'. It is possible to view this state via isClosed() and isRunning()
methods, hopwever these do not synchronise in the same way, meaning one thread (e.g the app
thread) viewing these states may not see a previous update by another thread (e.g the client).
> These methods are only used in a couple of places, and reading a stale value will typically
only lead to further use of the queue (using methods which are synchronized around the state),
so this shouldnt really cause significant issue, but it would be better to ensure the updates
are seen promptly.



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