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Posted to hdfs-dev@hadoop.apache.org by "Eli Collins (Created) (JIRA)" <ji...@apache.org> on 2012/03/25 20:37:28 UTC

[jira] [Created] (HDFS-3145) Disallow self failover

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.

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

After the failover above, nn2 will be active.

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