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Posted to issues@hbase.apache.org by "Nicolas Liochon (JIRA)" <ji...@apache.org> on 2013/09/09 18:29:53 UTC

[jira] [Created] (HBASE-9471) htrace synchronized on getInstance

Nicolas Liochon created HBASE-9471:
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             Summary: htrace synchronized on getInstance
                 Key: HBASE-9471
                 URL: https://issues.apache.org/jira/browse/HBASE-9471
             Project: HBase
          Issue Type: Bug
          Components: regionserver
    Affects Versions: 0.98.0, 0.96.0
            Reporter: Nicolas Liochon
            Assignee: Nicolas Liochon
            Priority: Minor


When doing tests on cached data, one of the bottleneck is the getInstance() on HTrace, called in RequestContext#set() --> Trace.isTracing()

When it's fixed, we see threads blocked in sendResponse and in the metrics (with hadoop 1).

The difference is not huge (it's in the range 0-5%), but there is no reason to keep this.

I'm sending a pull request to htrace.

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