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https://issues.apache.org/jira/browse/HADOOP-5514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12682882#action_12682882
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Arun C Murthy commented on HADOOP-5514:
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+1.
Eventually we should replace synchronized methods in JobTrackerMetricsInst with
AtomicIntegers as applicable... I'd do it as a separate patch.
> Add waiting/failed tasks to JobTracker metrics
> ----------------------------------------------
>
> Key: HADOOP-5514
> URL: https://issues.apache.org/jira/browse/HADOOP-5514
> Project: Hadoop Core
> Issue Type: Improvement
> Components: mapred, metrics
> Reporter: Chris Douglas
> Assignee: Chris Douglas
> Attachments: 5514-0.patch
>
>
> In addition to launched and completed tasks, it would be helpful if the
> number of waiting tasks and failed tasks were accumulated as metrics.
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