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https://issues.apache.org/jira/browse/YARN-314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15323354#comment-15323354
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Jason Lowe commented on YARN-314:
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bq. Do we have applications that need this capability?
Tez can sometimes end up asking for multiple sizes at the same priority, and
that sometimes ends up causing jobs to hang. See TEZ-3296.
> Schedulers should allow resource requests of different sizes at the same
> priority and location
> ----------------------------------------------------------------------------------------------
>
> Key: YARN-314
> URL: https://issues.apache.org/jira/browse/YARN-314
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: scheduler
> Affects Versions: 2.0.2-alpha
> Reporter: Sandy Ryza
> Attachments: yarn-314-prelim.patch
>
>
> Currently, resource requests for the same container and locality are expected
> to all be the same size.
> While it it doesn't look like it's needed for apps currently, and can be
> circumvented by specifying different priorities if absolutely necessary, it
> seems to me that the ability to request containers with different resource
> requirements at the same priority level should be there for the future and
> for completeness sake.
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