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From "Eli Collins (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-8208) Disallow self failover
Date Sun, 25 Mar 2012 22:40:28 GMT

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

Eli Collins updated HADOOP-8208:

    Attachment:     (was: hdfs-3145.txt)
> 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: hadoop-8208.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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