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https://issues.apache.org/jira/browse/YARN-9772?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16930521#comment-16930521
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Tarun Parimi commented on YARN-9772:
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bq. Should we extend the duplicates check (as of now, it does only for leaf
queues) to parent queues as well?
[~maniraj...@gmail.com], Only problem I see is that there will be existing
users who might have already have a queue config containing parent queues with
duplicate names. They will face error when they upgrade and be forced to modify
their current queue config.
> CapacitySchedulerQueueManager has incorrect list of queues
> ----------------------------------------------------------
>
> Key: YARN-9772
> URL: https://issues.apache.org/jira/browse/YARN-9772
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Manikandan R
> Assignee: Manikandan R
> Priority: Major
>
> CapacitySchedulerQueueManager has incorrect list of queues when there is more
> than one parent queue (say at middle level) with same name.
> For example,
> * root
> ** a
> *** b
> **** c
> *** d
> **** b
> ***** e
> {{CapacitySchedulerQueueManager#getQueues}} maintains these list of queues.
> While parsing "root.a.d.b", it overrides "root.a.b" with new Queue object in
> the map because of similar name. After parsing all the queues, map count
> should be 7, but it is 6. Any reference to queue "root.a.b" in code path is
> nothing but "root.a.d.b" object. Since
> {{CapacitySchedulerQueueManager#getQueues}} has been used in multiple places,
> will need to understand the implications in detail. For example,
> {{CapapcityScheduler#getQueue}} has been used in many places which in turn
> uses {{CapacitySchedulerQueueManager#getQueues}}. cc [~eepayne], [~sunilg]
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