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https://issues.apache.org/jira/browse/MAPREDUCE-5351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13692991#comment-13692991
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Alejandro Abdelnur commented on MAPREDUCE-5351:
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The changes in CleanupQueue.java, wouldn't be enough to close the FS instance
got there instead doing a closeAll?
On how to test it, could we temporary (for testing) instrument the FS cache
size and monitor it does grow over time?
> 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
> Attachments: 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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