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https://issues.apache.org/activemq/browse/AMQ-2082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dejan Bosanac resolved AMQ-2082.
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Resolution: Fixed
Fix Version/s: 5.3.0
Assignee: Dejan Bosanac
This has been fixed with a patch for [AMQ-2016]. I committed the test case
(with a few more small changes) in SVN revision 737062, so we can be sure it
doesn't repeat in the future. The test case is modified a bit, since you
shouldn't start your groups with sequence 0. It will automatically close the
group and cause test to fail. Changing it to 1, makes this test pass.
> Message Groups fail to preserve exclusivity when a new consumer is added.
> -------------------------------------------------------------------------
>
> Key: AMQ-2082
> URL: https://issues.apache.org/activemq/browse/AMQ-2082
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.2.0
> Environment: Cent5; Java 6u11; ActiveMQ 5.2;
> Reporter: Gordon Hopper
> Assignee: Dejan Bosanac
> Fix For: 5.3.0
>
> Attachments: MessageGroupNewConsumerTest.java
>
>
> If a new consumer is added to a running system, the exclusive property of a
> message group can be temporarily violated.
> Uploading a new unit test. An excerpt of the test results is below, which
> shows that the message groups GrA and GrB are being handled by both consumers
> simultaneously.
> 15:11:58,498 INFO GroupNewConsumerTest - Con2 got message GrA-5
> 15:11:58,560 INFO GroupNewConsumerTest - Con2 got message GrB-5
> 15:11:58,560 INFO GroupNewConsumerTest - Con1 got message GrB-3
> 15:11:58,623 INFO GroupNewConsumerTest - Con1 got message GrA-4
> 15:11:58,623 INFO GroupNewConsumerTest - Con2 got message GrA-6
> 15:11:58,685 INFO GroupNewConsumerTest - Con1 got message GrB-4
> 15:11:58,685 INFO GroupNewConsumerTest - Con2 got message GrB-6
> 15:11:58,748 INFO GroupNewConsumerTest - Con1 got message GrB-7
> 15:11:58,748 INFO GroupNewConsumerTest - Con2 got message GrA-7
> 15:11:58,810 INFO GroupNewConsumerTest - Con1 got message GrB-8
> 15:11:58,810 INFO GroupNewConsumerTest - Con2 got message GrA-8
> 15:11:58,873 INFO GroupNewConsumerTest - Con2 got message GrA-9
> 15:11:58,935 INFO GroupNewConsumerTest - Con2 got message GrB-9
> This may be the same issue described in:
> http://www.nabble.com/Message-groups-not-working-when-consuming-existing-messages-td18445237.html#a18445237
> Note that setting the prefetch to 1 made reproducing the issue much easier.
> (See the unit test)
> keywords: JMSXGroup JMSXGroupID JMSXGroupSeq
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