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https://issues.apache.org/jira/browse/GEODE-5922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17253135#comment-17253135
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ASF GitHub Bot commented on GEODE-5922:
---------------------------------------

bschuchardt opened a new pull request #5870:
URL: https://github.com/apache/geode/pull/5870


   reverting 3ed37a754d789bb52cf190db23088e819955fd58 for performance testing
   
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> 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 J Schuchardt
>            Assignee: Bruce J Schuchardt
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.8.0
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> 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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