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https://issues.apache.org/jira/browse/QPID-6213?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14224624#comment-14224624
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Gordon Sim commented on QPID-6213:
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>From the log it looks like the problem you are seeing is caused by delayed
>timer tasks for the heartbeats. That suggests that the timer is getting messed
>up internally. A common way for that to happen - and the cause the first fix
>addressed - is for the same task to be added more than once (in which case the
>fire time may won't match the order in all cases). Though I can't yet see the
>path for which that would now be happening, it might be worth some extra
>checking to see if we can spot anything.
> qpidd misses heartbeats
> -----------------------
>
> Key: QPID-6213
> URL: https://issues.apache.org/jira/browse/QPID-6213
> Project: Qpid
> Issue Type: Bug
> Components: C++ Broker
> Affects Versions: 0.30
> Reporter: Gordon Sim
> Assignee: Gordon Sim
> Fix For: 0.31
>
> Attachments: qpid-6213-svn-01.patch, qpidd.log.gz
>
>
> Caused by https://issues.apache.org/jira/browse/QPID-5758. Reproducer from
> Pavel Moravec: create many heartbeat enabled connections and queues (e.g. 500
> idle receivers, each with their own queue) and have the purge interval
> relatively short (to speed up reproducing).
> The broker misses heartbeats and connections get timed out.
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