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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3151) Improve ActiveStandbyElector's behavior when session expires
Date Mon, 26 Mar 2012 04:48:31 GMT
Improve ActiveStandbyElector's behavior when session expires
------------------------------------------------------------

                 Key: HDFS-3151
                 URL: https://issues.apache.org/jira/browse/HDFS-3151
             Project: Hadoop HDFS
          Issue Type: Improvement
    Affects Versions: 0.24.0, 0.23.3
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon


Currently when the ZK session expires, it results in a fatal error being sent to the application
callback. This is not the best behavior -- for example, in the case of HA, if ZK goes down,
we would like the current state to be maintained, rather than causing either NN to abort.
When the ZK clients are able to reconnect, they should sort out the correct leader based on
the normal locking schemes.

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