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https://issues.apache.org/jira/browse/QPID-4144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13418461#comment-13418461
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Justin Ross commented on QPID-4144:
-----------------------------------
Reviewed by Gordon. Approved for 0.18.
> HA broker deadlocks on broeker::QueueRegistry lock and ha::Primary lock
> -----------------------------------------------------------------------
>
> Key: QPID-4144
> URL: https://issues.apache.org/jira/browse/QPID-4144
> Project: Qpid
> Issue Type: Bug
> Components: C++ Clustering
> Affects Versions: 0.17
> Reporter: Alan Conway
> Assignee: Alan Conway
> Fix For: 0.18
>
> Attachments: thread-dump.txt
>
>
> Running tests repeatedly, the broker deadlocked with the attached stack trace.
> The problem call sequences are:
> 1. QueueRegistry::destroy takes QueuerRegistry lock >
> ConfigurationObserver::queueDestroy > ha::Primary::queueDestroy takes Primary
> lock.
> 2. ConnectionObserver::opened cals Primary::opened lock>
> RemoteBackup>getQueues().eachQueue
> This patch breaks the deadlock at both ends: QueueRegistry no longer holds
> the lock across the observer call and Primary does not hold the lock across
> eachQueue.
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