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https://issues.apache.org/jira/browse/HADOOP-5548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12688276#action_12688276
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Hemanth Yamijala commented on HADOOP-5548:
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Just FYI, the fair scheduler does not use the cluster status to find the total
running maps / reduces. This is a different problem. But fortunately, this
issue will not result in underutilization when used with the fair scheduler.
> Observed negative running maps on the job tracker
> -------------------------------------------------
>
> Key: HADOOP-5548
> URL: https://issues.apache.org/jira/browse/HADOOP-5548
> Project: Hadoop Core
> Issue Type: Bug
> Affects Versions: 0.20.0
> Reporter: Owen O'Malley
> Assignee: Amareshwari Sriramadasu
> Priority: Blocker
>
> We saw in both the web/ui and cli tools:
> {noformat}
> Cluster Summary (Heap Size is 11.7 GB/13.37 GB)
> Maps Reduces Total Nodes Map Task Reduce Task Avg. Blacklisted
> Submissions Capacity Capacity Tasks/Node Nodes
> -971 0 133 434 1736 1736 8.00 0
> {noformat}
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