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https://issues.apache.org/jira/browse/MAPREDUCE-1847?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12876842#action_12876842
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Allen Wittenauer commented on MAPREDUCE-1847:
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While doing some work on the grid, I killed 4 task trackers. For one
particular task, the summary information still believed that tasks were running
on those nodes:
6 running reduce tasks using 6 reduce slots.
This was clearly impossible, as there were only 2 pending reduce tasks that
still had to be recomputed. The map task summary information was correct.
> capacity scheduler job tasks summaries are wrong if nodes fail
> --------------------------------------------------------------
>
> Key: MAPREDUCE-1847
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1847
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: contrib/capacity-sched
> Reporter: Allen Wittenauer
> Priority: Minor
>
> The Job Scheduling Information the web UI is needs to be re-computed in case
> nodes fail. Otherwise it will report tasks are running that are not.
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