qiuliang created YARN-8978:
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Summary: 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
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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