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From "Eli Collins (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3708) transitionToStandby may NPE
Date Tue, 24 Jul 2012 03:31:34 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3708?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13421146#comment-13421146
] 

Eli Collins commented on HDFS-3708:
-----------------------------------

Thanks, didn't realize the NPE was cleared up. Agree, we can punt on this.

How about making manual transitionToActive and transitionToStandby log a WARNING of the ramifications
(split brain) and indicating failover should be used instead?

Thanks to Stephen Chu for identifying this originally btw.
                
> transitionToStandby may NPE
> ---------------------------
>
>                 Key: HDFS-3708
>                 URL: https://issues.apache.org/jira/browse/HDFS-3708
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 2.0.0-alpha
>            Reporter: Eli Collins
>            Priority: Minor
>              Labels: newbie
>
> Setting both namenodes active and then trying to turn one to standby results in a NullPointerException
and the NameNode process is killed.

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