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https://issues.apache.org/jira/browse/MAPREDUCE-3631?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arun C Murthy resolved MAPREDUCE-3631.
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Resolution: Duplicate
Fixed via MAPREDUCE-3126.
> Corner case in headroom calculation
> -----------------------------------
>
> Key: MAPREDUCE-3631
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3631
> Project: Hadoop Map/Reduce
> Issue Type: Task
> Components: mrv2
> Affects Versions: 0.23.0
> Reporter: Amol Kekre
> Fix For: 0.23.1
>
>
> When there is a single queue and a large job fills up the whole cluster, a
> lost NM can lead to wrong headroom when all
> slots are taken up by reduces since at that point headroom isn't recomputed.
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