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https://issues.apache.org/jira/browse/ARTEMIS-2161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16937499#comment-16937499
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Keith Wall commented on ARTEMIS-2161:
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[~robbie] [~gsim] [~clebertsuconic]  I tested 2.10 with Gordon's attached 
reproducer (release.py).  I agree it looks like this issue is fixed.

> [AMQP] released messages lose order
> -----------------------------------
>
>                 Key: ARTEMIS-2161
>                 URL: https://issues.apache.org/jira/browse/ARTEMIS-2161
>             Project: ActiveMQ Artemis
>          Issue Type: Bug
>    Affects Versions: 2.6.3
>            Reporter: Gordon Sim
>            Priority: Major
>         Attachments: release.py
>
>
> If messages are explicitly released, they lose their original ordering. 
> (Implicit release by ending session without acknowledging seems *not* to have 
> the same effect).
> E.g. using proton python examples (with queue named 'examples' created, else 
> use -a option below):
> {noformat}
> $ ./simple_send.py -m 20
> all messages confirmed
> $ ./simple_recv.py -m 5
> {u'sequence': int32(1)}
> {u'sequence': int32(2)}
> {u'sequence': int32(3)}
> {u'sequence': int32(4)}
> {u'sequence': int32(5)}
> $ ./simple_recv.py -m 5
> {u'sequence': int32(11)}
> {u'sequence': int32(10)}
> {u'sequence': int32(9)}
> {u'sequence': int32(8)}
> {u'sequence': int32(7)}
> $ ./simple_recv.py -m 5
> {u'sequence': int32(16)}
> {u'sequence': int32(15)}
> {u'sequence': int32(14)}
> {u'sequence': int32(13)}
> {u'sequence': int32(12)}
> {noformat}
> Ideally, with a single consumer like this, the order would be preserved.



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