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From "Sandy Ryza (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5351) JobTracker memory leak caused by CleanupQueue reopening FileSystem
Date Wed, 03 Jul 2013 17:18:22 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13699196#comment-13699196
] 

Sandy Ryza commented on MAPREDUCE-5351:
---------------------------------------

Uploaded a new patch that updates the comments and the test case.
                
> JobTracker memory leak caused by CleanupQueue reopening FileSystem
> ------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5351
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5351
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>    Affects Versions: 1.1.2
>            Reporter: Sandy Ryza
>            Assignee: Sandy Ryza
>            Priority: Critical
>             Fix For: 1.2.1
>
>         Attachments: MAPREDUCE-5351-1.patch, MAPREDUCE-5351-2.patch, MAPREDUCE-5351-addendum-1.patch,
MAPREDUCE-5351-addendum.patch, MAPREDUCE-5351.patch
>
>
> When a job is completed, closeAllForUGI is called to close all the cached FileSystems
in the FileSystem cache.  However, the CleanupQueue may run after this occurs and call FileSystem.get()
to delete the staging directory, adding a FileSystem to the cache that will never be closed.
> People on the user-list have reported this causing their JobTrackers to OOME every two
weeks.

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