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From "Eli Collins (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3145) Disallow self failover
Date Sun, 25 Mar 2012 18:37:28 GMT
Disallow self failover

                 Key: HDFS-3145
                 URL: https://issues.apache.org/jira/browse/HDFS-3145
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: ha
            Reporter: Eli Collins
            Assignee: Eli Collins

It is currently possible for users to make a standby NameNode failover to itself and become
active. We shouldn't allow this to happen in case operators mistype and miss the fact that
there are now two active NNs.

bash-4.1$ hdfs haadmin -ns ha-nn-uri -failover nn2 nn2
Failover from nn2 to nn2 successful

After the failover above, nn2 will be active.

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