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https://issues.apache.org/jira/browse/YARN-8978?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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qiuliang reopened YARN-8978:
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> For fair scheduler, application with higher priority should also get priority
> resources for running AM
> ------------------------------------------------------------------------------------------------------
>
> Key: YARN-8978
> URL: https://issues.apache.org/jira/browse/YARN-8978
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: fairscheduler
> Reporter: qiuliang
> Priority: Major
> Attachments: YARN-8978.001.patch
>
>
> In order to allow important applications to run earlier, we used priority
> scheduling in the fair scheduler, and FairSharePolicy uses YARN-6307.
> Considering this situation, there are two applications (with different
> priorities) in the same queue and both are accepted. Both applications are
> demanding and hungry when dispatched to the queue. Next, calculate the weight
> ratio. Since the used resources of both applications are 0, the weight ratio
> is also 0. The priority is invalid in this case. Low-priority applications
> may get resources to run AM earlier than high-priority applications.
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