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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-3714) Disallow manual failover to already active NN when auto failover is enabled
Date Tue, 24 Jul 2012 02:55:34 GMT
Eli Collins created HDFS-3714:
---------------------------------

             Summary: Disallow manual failover to already active NN when auto failover is
enabled
                 Key: HDFS-3714
                 URL: https://issues.apache.org/jira/browse/HDFS-3714
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: auto-failover
    Affects Versions: 2.0.0-alpha
            Reporter: Eli Collins
            Priority: Minor


If nn1 is active and nn2 is standby "hdfs haadmin -failover nn2 nn1" says that failover to
nn1 is successful even though nn1 is already active. When only manual failover is active,
there is a check that tells users that the user can't failover to an already active service.
We should have the same check for auto failover.

{noformat}
bash-4.1$ hdfs haadmin -failover nn2 nn1
Failover to NameNode at brut01.sf.cloudera.com/172.22.35.149:17020 successful
bash-4.1$ hdfs haadmin -failover nn2 nn1
Failover to NameNode at brut01.sf.cloudera.com/172.22.35.149:17020 successful
bash-4.1$ hdfs haadmin -failover nn2 nn1
Failover to NameNode at brut01.sf.cloudera.com/172.22.35.149:17020 successful
{noformat}

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