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https://issues.apache.org/jira/browse/HADOOP-4445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12652007#action_12652007
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Hemanth Yamijala commented on HADOOP-4445:
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We should also check that if this info is periodically checked, say once every
30 seconds or so (equal to a refresh interval on the web page), the performance
is still fine.
In case this is turning out to be an issue, caching the values maybe an option.
We can update it periodically like I suggested above.
> Wrong number of running map/reduce tasks are displayed in queue information.
> ----------------------------------------------------------------------------
>
> Key: HADOOP-4445
> URL: https://issues.apache.org/jira/browse/HADOOP-4445
> Project: Hadoop Core
> Issue Type: Bug
> Components: contrib/capacity-sched
> Affects Versions: 0.19.0
> Environment: Hadoop r705159, Queue=default, GC=100%
> MapCapacity=ReduceCapacity=212
> Reporter: Karam Singh
> Assignee: Sreekanth Ramakrishnan
>
> Wrong number of running map/reduce tasks are displayed in queue information.
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