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https://issues.apache.org/jira/browse/GEODE-5922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16662839#comment-16662839
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ASF subversion and git services commented on GEODE-5922:
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Commit 7b7fed861903d9a9660e1f5b1c4d778d14f5eca5 in geode's branch
refs/heads/feature/GEODE-5922 from [~bschuchardt]
[ https://gitbox.apache.org/repos/asf?p=geode.git;h=7b7fed8 ]
GEODE-5922 SerialGatewaySenderQueue concurrency is poorly implemented
Replaced simple synchronization with a fair write-lock. The use of
sync to enforce serial queueing wasn't fair and caused inconsistent
latency. I observed one thread that was blocked trying to get the
sync for over 30 seconds while other subsequent threads were able to
get the sync and queue their events.
> SerialGatewaySenderQueue concurrency is poorly implemented
> ----------------------------------------------------------
>
> Key: GEODE-5922
> URL: https://issues.apache.org/jira/browse/GEODE-5922
> Project: Geode
> Issue Type: Improvement
> Components: wan
> Reporter: Bruce Schuchardt
> Assignee: Bruce Schuchardt
> Priority: Major
>
> This class uses synchronization on the queue to limit access to one put at a
> time. Synchronization isn't a fair locking mechanism so threads can be
> blocked trying to add events to the queue while other more recent events get
> the lock and insert their events. This causes inconsistent latency which
> I've observed being as long as 30 seconds, causing client connections to be
> shut down by the ClientHealthMonitor.
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