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https://issues.apache.org/jira/browse/YARN-6443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15957035#comment-15957035
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Konstantinos Karanasos commented on YARN-6443:
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I was thinking about it last night and had the same concerns with Jason, i.e.,
couldn't think of cases when an application wants to "bypass" priority (which
could lead to unexpected starvation of its tasks), instead of submitting tasks
with the same priority and thereby give more weight to locality.
> Allow for Priority order relaxing in favor of improved node/rack locality
> --------------------------------------------------------------------------
>
> Key: YARN-6443
> URL: https://issues.apache.org/jira/browse/YARN-6443
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: capacity scheduler, fairscheduler
> Reporter: Arun Suresh
> Assignee: Arun Suresh
>
> Currently the Schedulers examine an applications pending Requests in Priority
> order. This JIRA proposes to introduce a flag (either via the
> ApplicationMasterService::registerApplication() or via some Scheduler
> configuration) to favor an ordering that is baised to the node that is
> currently heartbeating by relaxing the priority constraint.
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