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From "Alan Conway (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (QPID-5966) HA mixing tx enqueue and non-tx dequeue leaves extra messages on backup
Date Wed, 06 Aug 2014 11:17:12 GMT

    [ https://issues.apache.org/jira/browse/QPID-5966?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14087555#comment-14087555
] 

Alan Conway commented on QPID-5966:
-----------------------------------

See also https://bugzilla.redhat.com/show_bug.cgi?id=1127089

>  HA mixing tx enqueue and non-tx dequeue leaves extra messages on backup
> ------------------------------------------------------------------------
>
>                 Key: QPID-5966
>                 URL: https://issues.apache.org/jira/browse/QPID-5966
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Clustering
>    Affects Versions: 0.28
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>
> Description of problem:
> With HA enabled, 2 or more node cluster. If a message is enqueued in a transaction, and
then dequeued with no transaction, the message is left on the backup brokers.
> Version-Release number of selected component (if applicable):
> Up to trunk r1615992, 0.22-mrg f22fae4
> How reproducible: 100%
> Steps to Reproduce:
> qpid-send -a 'q;{create:always}' -b 20.0.20.200 --content-string foo --tx 1
> qpid-receive -a 'q;{create:always}' -b 20.0.20.200
> Then on each node:
> qpid-stat -q --ha-admin
> Actual results:
> Primary q is empty, backup q still has 1 message
> Message is enqueued twice on backup and dequeued only once.
> Expected results:
> Primary and backup q empty, message enqueued and dequeued once on primary and backup
> Additional info:
> With a tx dequeue (add --tx 1 to qpid-receive) the message is removed completely on the
backup so at first glance things appear OK. However qpid-stat shows it is enqueued and dequeued
_twice_ which is incorrect.
> Using the python client there is still a message left on the backup, but there is only
1 enqueue and no dequeue, rather than 2 enqueues and 1 dequeue.



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