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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8208) Disallow self failover
Date Fri, 30 Mar 2012 13:10:37 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13242317#comment-13242317
] 

Hudson commented on HADOOP-8208:
--------------------------------

Integrated in Hadoop-Hdfs-trunk #1000 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1000/])
    HADOOP-8208. Disallow self failover. Contributed by Eli Collins (Revision 1306935)

     Result = FAILURE
eli : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1306935
Files : 
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/ha/FailoverController.java
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/ha/TestFailoverController.java

                
> 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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