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https://issues.apache.org/jira/browse/HADOOP-4445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12643951#action_12643951
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Vinod K V commented on HADOOP-4445:
-----------------------------------
The number of Waiting {Maps|Reduces} reduces is derived from the running counts
which are not synchronized with the exact counts all the time. So, they won't
be correct all the time, even though at the point of their actual usage in the
scheduler we make sure that they are correct. Hence, the waiting counts should
be removed from the scheduler information.
The correct waiting counts can be maintained by JT(just like running counts)
and stored in the cluster-summary; will file a JIRA to get that information
there.
> 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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