Rohith Sharma K S commented on YARN-3996:

CIIAW, SchedulerUtils.normalizeRequests() is being called in allocate() in CS 
and FS which resourceRequest is normalized(reset) to minimumAllocation. So, it 
should not be matter for AM container resource Request where normalization is 
done in RMAppManager. Instead of normalizing at scheduler, here normalization 
is done at RMAppManager. Does this is impacting?

> YARN-789 (Support for zero capabilities in fairscheduler) is broken after 
> YARN-3305
> -----------------------------------------------------------------------------------
>                 Key: YARN-3996
>                 URL: https://issues.apache.org/jira/browse/YARN-3996
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler, fairscheduler
>            Reporter: Anubhav Dhoot
>            Assignee: Anubhav Dhoot
>            Priority: Critical
> RMAppManager#validateAndCreateResourceRequest calls into normalizeRequest 
> with mininumResource for the incrementResource. This causes normalize to 
> return zero if minimum is set to zero as per YARN-789

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