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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-742) Log aggregation causes a lot of redundant setPermission calls
Date Wed, 05 Jun 2013 14:08:22 GMT

    [ https://issues.apache.org/jira/browse/YARN-742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13675939#comment-13675939
] 

Hudson commented on YARN-742:
-----------------------------

Integrated in Hadoop-Mapreduce-trunk #1447 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1447/])
    YARN-742. Log aggregation causes a lot of redundant setPermission calls. Contributed by
Jason Lowe. (Revision 1489596)

     Result = SUCCESS
kihwal : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1489596
Files : 
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
* /hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/logaggregation/LogAggregationService.java
* /hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/logaggregation/TestLogAggregationService.java

                
> Log aggregation causes a lot of redundant setPermission calls
> -------------------------------------------------------------
>
>                 Key: YARN-742
>                 URL: https://issues.apache.org/jira/browse/YARN-742
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 0.23.7, 2.0.4-alpha
>            Reporter: Kihwal Lee
>            Assignee: Jason Lowe
>         Attachments: YARN-742-1.branch-0.23.patch, YARN-742-1.patch, YARN-742.patch
>
>
> In one of our clusters, namenode RPC is spending 45% of its time on serving setPermission
calls. Further investigation has revealed that most calls are redundantly made on /mapred/logs/<user>/logs.
Also mkdirs calls are made before this.

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