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  1. Hadoop HDFS
  2. HDFS-3714

Disallow manual failover to already active NN when auto failover is enabled

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Details

    • Bug
    • Status: Open
    • Minor
    • Resolution: Unresolved
    • 2.0.0-alpha
    • None
    • auto-failover

    Description

      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.

      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
      

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            Unassigned Unassigned
            eli Eli Collins
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            Dates

              Created:
              Updated: