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Posted to common-issues@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2017/01/27 21:12:25 UTC

[jira] [Created] (HADOOP-14031) Reduce fair call queue performance impact

Daryn Sharp created HADOOP-14031:
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             Summary: Reduce fair call queue performance impact
                 Key: HADOOP-14031
                 URL: https://issues.apache.org/jira/browse/HADOOP-14031
             Project: Hadoop Common
          Issue Type: Bug
          Components: ipc
    Affects Versions: 2.7.0
            Reporter: Daryn Sharp
            Assignee: Daryn Sharp


The fair call queue has performance deficits that create an illusion of reasonable performance under heavy load.  However, there is excessive lock contention, priority inversion, and pushback/reconnect issues that combine to create an artificial rate-limiting on the ingress.

The result is server metrics look good, call queue looks low, yet clients experience dismal latencies.



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