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From "Jonathan Hung (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-6152) Used queue percentage not accurate in UI for 2.7 and below when using DominantResourceCalculator
Date Mon, 06 Feb 2017 22:30:41 GMT
Jonathan Hung created YARN-6152:
-----------------------------------

             Summary: Used queue percentage not accurate in UI for 2.7 and below when using
DominantResourceCalculator
                 Key: YARN-6152
                 URL: https://issues.apache.org/jira/browse/YARN-6152
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Jonathan Hung
            Assignee: Jonathan Hung


YARN-4751 adds the {{getUsedCapacity}} and {{getAbsoluteUsedCapacity}} methods to {{AbstractCSQueue}}
which is used to display queue usage in UI for branch-2.7 and below. However if there is more
than one partition in the cluster, with different dominant resources, then queue usage may
not be displayed as expected.

Contrived example: Default partition has <90GB, 10vcores>, and "test" partition has
<10GB, 90vcores>. {{root}} queue in default partition uses <50GB, 10vcores>. Here
we expect queue usage to be 100 since it is using all vcores in default partition. But the
displayed usage will be (50GB/100GB)/(90GB/100GB) = 55.6%.



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