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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-3104) RM continues to send new AMRM tokens every heartbeat between rolling and activation
Date Tue, 27 Jan 2015 17:01:34 GMT
Jason Lowe created YARN-3104:
--------------------------------

             Summary: RM continues to send new AMRM tokens every heartbeat between rolling
and activation
                 Key: YARN-3104
                 URL: https://issues.apache.org/jira/browse/YARN-3104
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.6.0
            Reporter: Jason Lowe


When the RM rolls a new AMRM secret, it conveys this to the AMs when it notices they are still
connected with the old key.  However neither the RM nor the AM explicitly close the connection
or otherwise try to reconnect with the new secret.  Therefore the RM keeps thinking the AM
doesn't have the new token on every heartbeat and keeps sending new tokens for the period
between the key roll and the key activation.  Once activated the RM no longer squawks in its
logs about needing to generate a new token every heartbeat (i.e.: second) for every app, but
the apps can still be using the old token.  The token is only checked upon connection to the
RM.  The apps don't reconnect when sent a new token, and the RM doesn't force them to reconnect
by closing the connection.




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