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From "Sunil G (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-4091) Improvement: Introduce more debug/diagnostics information to detail out scheduler activity
Date Thu, 27 Aug 2015 18:03:46 GMT
Sunil G created YARN-4091:
-----------------------------

             Summary: Improvement: Introduce more debug/diagnostics information to detail
out scheduler activity
                 Key: YARN-4091
                 URL: https://issues.apache.org/jira/browse/YARN-4091
             Project: Hadoop YARN
          Issue Type: Improvement
          Components: capacity scheduler, resourcemanager
    Affects Versions: 2.7.0
            Reporter: Sunil G
            Assignee: Sunil G


As schedulers are improved with various new capabilities, more configurations which tunes
the schedulers starts to take actions such as limit assigning containers to an application,
or introduce delay to allocate container etc. 
There are no clear information passed down from scheduler to outerworld under these various
scenarios. This makes debugging very tougher.

This ticket is an effort to introduce more defined states on various parts in scheduler where
it skips/rejects container assignment, activate application etc. Such information will help
user to know whats happening in scheduler.

Attaching a short proposal for initial discussion. We would like to improve on this as we
discuss.




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