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How to debug policy enforcement on YARN queues?

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I have a HDP 3.1 cluster and it seems that the fair policy isn't behaving as expected or YARN is misconfigured, since some users/applications/jobs are consuming more resources than we supposed it to use. So how do I debug/monitor YARN in a way that when some behaviour occurs I get notified, as well as, log the information I need to debug the queues so I can check if there is, in fact, a problem?

I appreciate any help.

mangohost

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