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https://issues.apache.org/jira/browse/MAPREDUCE-2320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved MAPREDUCE-2320.
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Resolution: Won't Fix
MR RAID has been replaced by HDFS EC in modern versions of Hadoop.
> RAID DistBlockFixer should limit pending jobs instead of pending files
> ----------------------------------------------------------------------
>
> Key: MAPREDUCE-2320
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2320
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: contrib/raid
> Affects Versions: 0.20.2, 0.20.3
> Reporter: Ramkumar Vadali
> Assignee: Ramkumar Vadali
> Priority: Minor
>
> DistBlockFixer limits the number of files being fixed simultaneously to avoid
> an unlimited backlog. This limits the number of parallel jobs though, and if
> one job has a long running task, it prevents newer jobs being started.
> Instead, it should have a limit on running jobs. That way, one long running
> task will not block other jobs.
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