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https://issues.apache.org/jira/browse/AMQ-7154?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16776944#comment-16776944
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Christopher L. Shannon commented on AMQ-7154:
---------------------------------------------
Yes, I just realized you were using an old version so I will close this out as
a duplicate.
> Broker Deadlock while processing expired DLQ messages
> -----------------------------------------------------
>
> Key: AMQ-7154
> URL: https://issues.apache.org/jira/browse/AMQ-7154
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.12.0
> Reporter: Kestutis Gedminas
> Priority: Major
> Attachments: amq.svg, threaddump.zip
>
>
> We get a deadlock on AMQ. After analysis, it looks like in case if expired
> messages thread is processing DLQ queue at the same moment when poisonAck is
> received we run into preexisting racing condition in code due to inconsistent
> lock acquiring order.
> [ !amq.svg|width=1000!|^amq.svg]
>
> [^threaddump.zip]
> [^amq.svg]
>
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