Tao Yang created YARN-8945:
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Summary: Calculation of Maximum applications should respect
specified and global maximum applications for absolute resource
Key: YARN-8945
URL: https://issues.apache.org/jira/browse/YARN-8945
Project: Hadoop YARN
Issue Type: Bug
Components: capacityscheduler
Affects Versions: 3.2.0
Reporter: Tao Yang
Assignee: Tao Yang
Currently maximum applications is expected to be calculated as follow according
to priority when using percentage based capacity：
(1) equals specified maximum applications for queues
(2) equals global maximum applications
(3) calculated as queue-capacity * maximum-system-applications
But for absolute resource configuration, maximum applications is calculated as
(3) in ParentQueue#deriveCapacityFromAbsoluteConfigurations, this is a strict
limit for high max-capacity and low capacity queues which have little
guaranteed resources but want to use lots of share resources. So I propose to
share the maximum applications calculation of percentage based capacity,
absolute resource can call the same calculation if necessary.
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