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https://issues.apache.org/jira/browse/YARN-4983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15254206#comment-15254206
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Daniel Templeton commented on YARN-4983:
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This also comes up as an issue with some unit tests. I agree that the root
issue is the erroneous assumption that the RM and scheduler won't be started a
second time from within the same VM. Ideally we'd fix it below the level or
the RM. Some of the unit tests that trip on it are only creating disembodied
schedulers.
> JVM and UGI metrics disappear after RM is once transitioned to standby mode
> ---------------------------------------------------------------------------
>
> Key: YARN-4983
> URL: https://issues.apache.org/jira/browse/YARN-4983
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Li Lu
> Assignee: Li Lu
> Attachments: YARN-4983-trunk.000.patch, YARN-4983-trunk.001.patch
>
>
> When get transitioned to standby, the RM will shutdown the existing metric
> system and relaunch a new one. This will cause the jvm metrics and ugi
> metrics to miss in the new metric system.
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