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Date: Tue, 1 Aug 2017 13:50:01 +0000 (UTC)
From: "Jason Lowe (JIRA)" <jira@apache.org>
To: yarn-dev@hadoop.apache.org
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Subject: [jira] [Created] (YARN-6917) Queue path is recomputed from scratch
 on every allocation
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archived-at: Tue, 01 Aug 2017 13:50:04 -0000

Jason Lowe created YARN-6917:
--------------------------------

             Summary: Queue path is recomputed from scratch on every allocation
                 Key: YARN-6917
                 URL: https://issues.apache.org/jira/browse/YARN-6917
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: capacityscheduler
    Affects Versions: 2.8.1
            Reporter: Jason Lowe
            Priority: Minor


As part of the discussion in YARN-6901 I noticed that we are recomputing a queue's path for every allocation.  Currently getting the queue's path involves calling getQueuePath on the parent then building onto that string with the basename of the queue.  In turn the parent's getQueuePath method does the same, so we end up spending time recomputing a string that will never change until a reconfiguration.

Ideally the queue path should be computed once during queue initialization rather than on-demand.


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