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From "Kihwal Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-742) Log aggregation causes a lot of redundant setPermission calls
Date Tue, 04 Jun 2013 21:21:21 GMT

    [ https://issues.apache.org/jira/browse/YARN-742?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13675262#comment-13675262

Kihwal Lee commented on YARN-742:

Jason, the test failed to merge in branch-0.23.
> 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.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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