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Posted to common-issues@hadoop.apache.org by "Eli Collins (Updated) (JIRA)" <ji...@apache.org> on 2012/03/25 21:53:26 UTC

[jira] [Updated] (HADOOP-8208) Disallow self failover

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

Eli Collins updated HADOOP-8208:
--------------------------------

    Attachment: hadoop-8208.txt

Updated patch rebased on trunk.
                
> 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, 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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