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From "Aleksandr Kovalenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-3526) Reassign Master: HDFS service check fails after Namenode reassignment with HA enabled
Date Wed, 16 Oct 2013 15:51:42 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-3526?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13796915#comment-13796915
] 

Aleksandr Kovalenko commented on AMBARI-3526:
---------------------------------------------

committed to trunk

> Reassign Master: HDFS service check fails after Namenode reassignment with HA enabled
> -------------------------------------------------------------------------------------
>
>                 Key: AMBARI-3526
>                 URL: https://issues.apache.org/jira/browse/AMBARI-3526
>             Project: Ambari
>          Issue Type: Task
>          Components: client
>    Affects Versions: 1.4.2
>            Reporter: Aleksandr Kovalenko
>            Assignee: Aleksandr Kovalenko
>            Priority: Critical
>             Fix For: 1.4.2
>
>         Attachments: AMBARI-3526.patch, reassign-step-4.png
>
>
> We need to make three changes to the wizard.
> # Step-4 (reassign-step4.png) needs to have first command as Stop NameNode. This command
should stop namenode component on the selected source host. This is to  makes sure that the
selected namenode host to be moved becomes standby before we proceed ahead.
> # We need to add one more step to the wizard after step-4 (Install, Start and Test).
The mockup and purpose of this new step is exactly same as of step7 (Start Components) in
namenode HA wizard. Start NameNode command in this step should start active namenode. Active
namenode should be on a host which was *not selected* as source host to be moved in the wizard.
> # There is only one manual command required on manual command page. The message for it
should be like:
> * Login to the newly installed NameNode host <target host hostname>
> * Initialize the metadata by running:
> {quote}
> sudo su -l hdfs -c 'hdfs namenode -bootstrapStandby'
> {quote}
> * Proceed next



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