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https://issues.apache.org/jira/browse/MAPREDUCE-1219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779941#action_12779941
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Amareshwari Sriramadasu commented on MAPREDUCE-1219:
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All tests passed on my machine except TestHdfsProxy
> JobTracker Metrics causes undue load on JobTracker
> --------------------------------------------------
>
> Key: MAPREDUCE-1219
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1219
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 0.21.0
> Reporter: Jothi Padmanabhan
> Assignee: Amareshwari Sriramadasu
> Attachments: MAPREDUCE-1219.patch, patch-1219-ydist.txt
>
>
> JobTrackerMetricsInst.doUpdates updates job-level counters of all running
> jobs into JobTracker's metrics causing very bad performance and hampers
> heartbeats. Since Job level metrics are better served by JobHistory, it may
> be a good idea to remove these from the metrics framework.
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