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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-742) Log aggregation causes a lot of redundant setPermission calls
Date Fri, 31 May 2013 18:28:20 GMT
Kihwal Lee created YARN-742:
-------------------------------

             Summary: 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: 2.0.4-alpha, 0.23.7
            Reporter: Kihwal Lee


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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