Sunil Govindan commented on YARN-2599:

Thanks [~bibinchundatt]

I do not think its a compatibility issue. Fundamentally current behaviour is 
broken. In one of old Jira prior to HA, I could see that each process was 
having its own jmx. So redirect on jmx was not correct. I am pulling this only 
to trunk and mark a note about same.

I could not get the metrics servlet. I ll dig in a bit. This seems very old, 
and I am not sure whether its already moved out or not,

> Standby RM should also expose some jmx and metrics
> --------------------------------------------------
>                 Key: YARN-2599
>                 URL: https://issues.apache.org/jira/browse/YARN-2599
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.5.1, 2.7.3, 3.0.0-alpha1
>            Reporter: Karthik Kambatla
>            Assignee: Rohith Sharma K S
>            Priority: Major
>         Attachments: YARN-2599.patch
> YARN-1898 redirects jmx and metrics to the Active. As discussed there, we 
> need to separate out metrics displayed so the Standby RM can also be 
> monitored. 

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