Robert Kanter created YARN-2241:

             Summary: Show nicer messages when ZNodes already exist in 
ZKRMStateStore on startup
                 Key: YARN-2241
             Project: Hadoop YARN
          Issue Type: Bug
    Affects Versions: 2.5.0
            Reporter: Robert Kanter
            Assignee: Robert Kanter
            Priority: Minor

When using the RMZKStateStore, if you restart the RM, you get a bunch of stack 
traces with messages like 
{{org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode = 
NodeExists for /rmstore}}.  This is expected as these nodes already exist from 
before.  We should catch these and print nicer messages.

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