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From "Benjamin Teke (Jira)" <j...@apache.org>
Subject [jira] [Created] (YARN-10396) Max applications calculation per queue disregards queue level settings in absolute mode
Date Wed, 12 Aug 2020 12:02:00 GMT
Benjamin Teke created YARN-10396:
------------------------------------

             Summary: Max applications calculation per queue disregards queue level settings
in absolute mode
                 Key: YARN-10396
                 URL: https://issues.apache.org/jira/browse/YARN-10396
             Project: Hadoop YARN
          Issue Type: Bug
            Reporter: Benjamin Teke
            Assignee: Benjamin Teke


Looking at the following code in {{org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.ParentQueue.java#L1126}}
{code:java}
int maxApplications = (int) (conf.getMaximumSystemApplications()
    * childQueue.getQueueCapacities().getAbsoluteCapacity(label));
leafQueue.setMaxApplications(maxApplications);{code}
In Absolute Resources mode setting the number of maximum applications on queue level gets
overridden with the system level setting scaled down to the available resources. This means
that the only way to set the maximum number of applications is to change the queue's resource
pool. This line should consider the queue's {{yarn.scheduler.capacity.\{queuepath}.maximum-applications
}}setting.



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