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From "Hadoop QA (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8208) Disallow self failover
Date Sun, 25 Mar 2012 18:57:27 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13237945#comment-13237945

Hadoop QA commented on HADOOP-8208:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision .

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    -1 patch.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/775//console

This message is automatically generated.
> 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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