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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-4041) Slow delegation token renewal can severely prolong RM recovery
Date Mon, 10 Aug 2015 18:28:45 GMT
Jason Lowe created YARN-4041:
--------------------------------

             Summary: Slow delegation token renewal can severely prolong RM recovery
                 Key: YARN-4041
                 URL: https://issues.apache.org/jira/browse/YARN-4041
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.6.0
            Reporter: Jason Lowe


When the RM does a work-preserving restart it synchronously tries to renew delegation tokens
for every active application.  If a token server happens to be down or is running slow and
a lot of the active apps were using tokens from that server then it can have a huge impact
on the time it takes the RM to process the restart.



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