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From "Eli Collins (Moved) (JIRA)" <j...@apache.org>
Subject [jira] [Moved] (HADOOP-8208) Disallow self failover
Date Sun, 25 Mar 2012 18:47:27 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-8208?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Eli Collins moved HDFS-3145 to HADOOP-8208:

          Component/s:     (was: ha)
     Target Version/s: 0.23.3  (was: 0.23.3)
    Affects Version/s:     (was: 0.23.2)
                  Key: HADOOP-8208  (was: HDFS-3145)
              Project: Hadoop Common  (was: Hadoop HDFS)
> Disallow self failover
> ----------------------
>                 Key: HADOOP-8208
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8208
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: ha
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>         Attachments: hdfs-3145.txt
> 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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