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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9471) htrace synchronized on getInstance
Date Fri, 13 Sep 2013 18:27:52 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9471?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13766764#comment-13766764
] 

Hudson commented on HBASE-9471:
-------------------------------

FAILURE: Integrated in hbase-0.96-hadoop2 #24 (See [https://builds.apache.org/job/hbase-0.96-hadoop2/24/])
HBASE-9471 htrace synchronized on getInstance (eclark: rev 1523040)
* /hbase/branches/0.96/pom.xml

                
> 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: Elliott Clark
>            Priority: Minor
>             Fix For: 0.98.0, 0.96.0
>
>         Attachments: HBASE-9471-0.patch
>
>
> 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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