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Posted to mapreduce-issues@hadoop.apache.org by "Harsh J (JIRA)" <ji...@apache.org> on 2012/04/22 07:37:35 UTC
[jira] [Resolved] (MAPREDUCE-1471) FileOutputCommitter does not
safely clean up it's temporary files
[ https://issues.apache.org/jira/browse/MAPREDUCE-1471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Harsh J resolved MAPREDUCE-1471.
--------------------------------
Resolution: Won't Fix
The resolution here was that the dev ought to implement a custom OC for such needs.
> FileOutputCommitter does not safely clean up it's temporary files
> -----------------------------------------------------------------
>
> Key: MAPREDUCE-1471
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1471
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 0.20.1
> Reporter: Jim Finnessy
> Original Estimate: 4h
> Remaining Estimate: 4h
>
> When the FileOutputCommitter cleans up during it's cleanupJob method, it potentially deletes the temporary files of other concurrent jobs.
> Since all the temporary files for all concurrent jobs are written to working_path/_temporary/ any concurrent tasks that have the same working_path will remove all currently executing jobs when it removes working_path/_temporary during job cleanup.
> If the file name output is guaranteed by the client application to be unique, the temporary files/directories should also be guaranteed to be unique to avoid this problem. Suggest modifying cleanupJob to only remove files that it created itself.
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