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https://issues.apache.org/jira/browse/DISPATCH-334?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15284882#comment-15284882
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ASF subversion and git services commented on DISPATCH-334:
----------------------------------------------------------

Commit 522760691e20976e298352253d25c805881dcd5f in qpid-dispatch's branch 
refs/heads/master from [~tr...@redhat.com]
[ https://git-wip-us.apache.org/repos/asf?p=qpid-dispatch.git;h=5227606 ]

DISPATCH-334 - Ensure that undelivered messages are only pushed out on outgoing 
links.


> Proton sequence error during backpressure with balanced distribution
> --------------------------------------------------------------------
>
>                 Key: DISPATCH-334
>                 URL: https://issues.apache.org/jira/browse/DISPATCH-334
>             Project: Qpid Dispatch
>          Issue Type: Bug
>          Components: Router Node
>    Affects Versions: 0.6.0
>            Reporter: Ted Ross
>            Assignee: Ted Ross
>            Priority: Blocker
>             Fix For: 0.6.0
>
>
> Scenario:
> {noformat}
>             +---------+        +---------+
> Sender1---->|         |        |         |---->Receiver1
>             |         |        |         |
>             | Router1 |========| Router2 |
>             |         |        |         |
> Sender2---->|         |        |         |---->Receiver2
>             +---------+        +---------+
> {noformat}
> All senders and receivers are using the same address, which is configured to 
> be "balanced".  When both Senders are operating, eventually one or both of 
> the sending links will fail due to a sequence error:
> {noformat}
>     ERROR:root:sequencing error, expected delivery-id 181, got 182
> {noformat}
> This occurs when one delivery results in a fanout of zero and is placed on 
> the incoming link's undelivered list.



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