Github user srowen commented on the issue:
https://github.com/apache/spark/pull/16819
I don't think this is a necessary change. Already, you can't ask for more
resources than the cluster has; the cluster won't grant them. Capping it here
means the app can't use more resources if the cluster suddenly gets more.
I see the problem you're trying to solve but the resource manager already
ramps up requests slowly, so I don't think this is the issue.
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