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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (YARN-4773) Log aggregation performs extraneous filesystem operations when rolling log aggregation is disabled
Date Wed, 09 Mar 2016 16:14:41 GMT

     [ https://issues.apache.org/jira/browse/YARN-4773?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Lowe reassigned YARN-4773:
--------------------------------

    Assignee: Jun Gong

Feel free, as I'm currently busy with other tasks.  I filed it and left it unassigned in the
hope someone in the community would have the time to pick it up, so thanks!

> Log aggregation performs extraneous filesystem operations when rolling log aggregation
is disabled
> --------------------------------------------------------------------------------------------------
>
>                 Key: YARN-4773
>                 URL: https://issues.apache.org/jira/browse/YARN-4773
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 2.6.0
>            Reporter: Jason Lowe
>            Assignee: Jun Gong
>            Priority: Minor
>
> I noticed when log aggregation occurs for an application the nodemanager is listing the
application's log directory in HDFS.  Apparently this is for removing old logs before uploading
new ones.  This is a wasteful operation when rolling log aggregation is disabled, since there
will be no prior logs in HDFS -- aggregation only occurs once when rolling log aggregation
is disabled.



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