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https://issues.apache.org/jira/browse/MAPREDUCE-533?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allen Wittenauer resolved MAPREDUCE-533.
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Resolution: Duplicate
> Support task preemption in Capacity Scheduler
> ---------------------------------------------
>
> Key: MAPREDUCE-533
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-533
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: capacity-sched
> Reporter: Tsz Wo Nicholas Sze
>
> Without preemption, it is not possible to guarantee capacity since long
> running jobs may occupy task slots for an arbitrarily long time.
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