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From "Daniel Templeton (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4983) JVM and UGI metrics disappear after RM is once transitioned to standby mode
Date Tue, 26 Apr 2016 21:20:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-4983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15258944#comment-15258944
] 

Daniel Templeton commented on YARN-4983:
----------------------------------------

One pedantic little comment: lest we work against YARN-4977, can we please include a message
on the throws tag in the javadoc headers?

Also, it looks like the test tests the transition from active to standby, but not back to
active.  Any value in adding that last step?

> 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, YARN-4983-trunk.002.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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