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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-6960) Support fast and graceful master failover
Date Tue, 09 Oct 2012 00:04:02 GMT
Jonathan Hsieh created HBASE-6960:
-------------------------------------

             Summary: Support fast and graceful master failover
                 Key: HBASE-6960
                 URL: https://issues.apache.org/jira/browse/HBASE-6960
             Project: HBase
          Issue Type: Bug
          Components: master
    Affects Versions: 0.94.2, 0.96.0
            Reporter: Jonathan Hsieh


If you have multiple masters, you should be able to kill the primary and have the backups
assume control within seconds instead of having to wait the default 3mins before an ephemeral
znode expires.  

The expected behavior is similar to how region servers when killed (not -9) trigger the servers
shutdown handler and quickly pass of its regions for reassignment.  In this case, a master
that is killed is removes the znode and allow another to become the primary.  A related follow
on feature could be the ability to failover to another primary without taking the orignal
primary down.

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