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https://issues.apache.org/jira/browse/MAPREDUCE-1974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Scott Chen updated MAPREDUCE-1974:
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Fix Version/s: 0.22.0
Affects Version/s: 0.21.0
0.22.0
(was: 0.20.1)
> FairScheduler can preempt the same task many times
> --------------------------------------------------
>
> Key: MAPREDUCE-1974
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1974
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: contrib/fair-share
> Affects Versions: 0.21.0, 0.22.0
> Reporter: Scott Chen
> Assignee: Scott Chen
> Fix For: 0.22.0
>
>
> In FairScheduler.preemptTasks(), tasks are collected from
> JobInProgress.runningMapCache.
> But tasks repeat multiple times in JobInProgress.runningMapCache (on rack,
> node and cluster).
> This makes FairScheduler preempt the same task many times.
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