Jian He commented on YARN-3503:

lgtm. thanks Varun !

> Expose disk utilization percentage and bad disk counts on NM via JMX
> --------------------------------------------------------------------
>                 Key: YARN-3503
>                 URL: https://issues.apache.org/jira/browse/YARN-3503
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>            Reporter: Varun Vasudev
>            Assignee: Varun Vasudev
>         Attachments: YARN-3503.0.patch
> It would be useful to expose the disk utilization as well as the number of 
> bad local disks on the NMs via JMX so that alerts can be setup for nodes.

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