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https://issues.apache.org/jira/browse/YARN-10124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17044286#comment-17044286
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Wilfred Spiegelenburg commented on YARN-10124:
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1: this point by itself sounds good, we want the child queues to get resources
and run the apps until they finish
2: if when 0 is set for the parent it is always above the hard limit then how
does 1 work? I would have expected that the limit is enforced in the hierarchy.
So can you please explain a bit more on how this works as this is not what I
would expect.
2: (second time) any resource above the limit should be preemptable so it lines
up with the first point 2.
3: is expected I would consider setting any on the root (min max etc) as a bug:
the root is the whole cluster and shoulkd thus mirror what is available in the
cluster without limits. Otherwise a cluster could never grow or shrink.
> Remove restriction of ParentQueue capacity zero when childCapacities > 0
> ------------------------------------------------------------------------
>
> Key: YARN-10124
> URL: https://issues.apache.org/jira/browse/YARN-10124
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacity scheduler
> Affects Versions: 3.3.0
> Reporter: Prabhu Joseph
> Assignee: Prabhu Joseph
> Priority: Major
> Attachments: YARN-10124-001.patch
>
>
> ParentQueue capacity cannot be set to 0 when child capacities > 0. To disable
> a parent queue temporarily, user can only STOP the queue but the capacity of
> the queue cannot be used for other queues. Allowing 0 capacity for parent
> queue will allow user to use the capacity for other queues and also to retain
> the child queue capacity values. (else user has to set all child queue
> capacities to 0)
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