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https://issues.apache.org/jira/browse/HADOOP-6096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12722101#action_12722101
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Tsz Wo (Nicholas), SZE commented on HADOOP-6096:
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See also [this
example|https://issues.apache.org/jira/browse/HADOOP-5701?focusedCommentId=12700284&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12700284].
> Support task preemption in Capacity Scheduler
> ---------------------------------------------
>
> Key: HADOOP-6096
> URL: https://issues.apache.org/jira/browse/HADOOP-6096
> Project: Hadoop Core
> Issue Type: New Feature
> Components: contrib/capacity-sched
> Reporter: Tsz Wo (Nicholas), SZE
>
> Without preemption, it is not possible to guarantee capacity since long
> running jobs may occupy task slots of an arbitrarily long time.
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