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From "Aleksandr Kovalenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-2814) NameNode HA Wizard: modify prerequisite checks
Date Tue, 06 Aug 2013 11:58:47 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-2814?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13730682#comment-13730682
] 

Aleksandr Kovalenko commented on AMBARI-2814:
---------------------------------------------

+1 for the patch
                
> NameNode HA Wizard: modify prerequisite checks
> ----------------------------------------------
>
>                 Key: AMBARI-2814
>                 URL: https://issues.apache.org/jira/browse/AMBARI-2814
>             Project: Ambari
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 1.4.0
>            Reporter: Andrii Tkach
>            Assignee: Andrii Tkach
>             Fix For: 1.4.0
>
>         Attachments: AMBARI-2814.patch
>
>
> Prerequisite Checks
> When the user clicks on "Enable NameNode HA", we will perform the following checks:
> If the cluster is already secure, display the error message in a popup: "You cannot enable
NameNode HA via this wizard as your cluster is already secured.  First, disable security by
going to Admin > Security, and then run this Enable NameNode HA wizard again.  After NameNode
HA is enabled, you can go back to Admin > Security to secure the cluster."
> If the above check passes, perform the following checks and display all the errors in
one popup:
> If the cluster consists of less than 3 hosts, display the error message is: "You must
have at least 3 hosts in your cluster to enable NameNode HA".
> If the cluster consists of less than 3 ZooKeeper Servers, the error message is: "You
must have at least 3 ZooKeeper Servers in your cluster to enable NameNode HA".
> If the NameNode is NOT in STARTED state, the error message is: "NameNode must be running
before you enable NameNode HA."
> The user cannot proceed forward in case any of the above errors have been encountered.

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