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https://issues.apache.org/jira/browse/MAPREDUCE-1219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779940#action_12779940
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Amareshwari Sriramadasu commented on MAPREDUCE-1219:
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test-patch result for Y!20 patch :
{noformat}
[exec] -1 overall.
[exec]
[exec] +1 @author. The patch does not contain any @author tags.
[exec]
[exec] -1 tests included. The patch doesn't appear to include any new
or modified tests.
[exec] Please justify why no tests are needed for
this patch.
[exec]
[exec] +1 javadoc. The javadoc tool did not generate any warning
messages.
[exec]
[exec] +1 javac. The applied patch does not increase the total number
of javac compiler warnings.
[exec]
[exec] +1 findbugs. The patch does not introduce any new Findbugs
warnings.
{noformat}
bq. -1 tests included.
The patch removes some existing code for which there are no unit tests.
> 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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