Alan Conway created QPID-4144:
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Summary: 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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