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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 20:17:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13237966#comment-13237966
] 

Hadoop QA commented on HADOOP-8208:
-----------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12519873/hadoop-8208.txt
  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 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    +1 eclipse:eclipse.  The patch built with eclipse:eclipse.

    +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9) warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit
warnings.

    -1 core tests.  The patch failed these unit tests:
                  org.apache.hadoop.fs.viewfs.TestViewFsTrash

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/778//testReport/
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/778//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: 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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