Management updates in timer create inconsistencies in a cluster.
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Key: QPID-2364
URL: https://issues.apache.org/jira/browse/QPID-2364
Project: Qpid
Issue Type: Bug
Components: C++ Broker
Affects Versions: 0.6
Reporter: Alan Conway
Assignee: Alan Conway
Management updates are triggered by a timer. They are not predictable for the
cluster and so can cause cluster shut-downs and inconsistent message delivery.
We have a hack in place that suppresses exceptions when the session receives
completions for transfers not yet sent (which is the usual manifestation of the
unpredictability). I.e. we have in essence disabled consistency checking for
management sessions. This solved immediate problems but would quickly stop
working if sessions/connections could be used for management and other things
(as will be more likely with QMFv2 where using management becomes quite
straightforward).
In a cluster, management updates need to be synchronized by executing them in
the cluster dispatch thread rather than a timer thread.
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