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https://issues.apache.org/jira/browse/YARN-6451?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15993981#comment-15993981
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Wangda Tan commented on YARN-6451:
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Thanks [~curino]/[~chris.douglas],

Beyond metrics, i think there're many information are not inside metrics, such 
as order of container allocation to ensure FIFO/fairness, etc. Have you thought 
about how to formalize these requirements?

> Add RM monitor validating metrics invariants
> --------------------------------------------
>
>                 Key: YARN-6451
>                 URL: https://issues.apache.org/jira/browse/YARN-6451
>             Project: Hadoop YARN
>          Issue Type: New Feature
>            Reporter: Carlo Curino
>            Assignee: Carlo Curino
>             Fix For: 3.0.0-alpha3
>
>         Attachments: YARN-6451.v0.patch, YARN-6451.v1.patch, 
> YARN-6451.v2.patch, YARN-6451.v3.patch, YARN-6451.v4.patch, YARN-6451.v5.patch
>
>
> For SLS runs, as well as for live test clusters (and maybe prod), it would be 
> useful to have a mechanism to continuously check whether core invariants of 
> the RM/Scheduler are respected (e.g., no priority inversions, fairness mostly 
> respected, certain latencies within expected range, etc..)



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