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From "Xi Wang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-3064) Ambari UI widgets should tolerate addition or removal of services
Date Tue, 10 Sep 2013 19:59:52 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-3064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13763426#comment-13763426
] 

Xi Wang commented on AMBARI-3064:
---------------------------------

Ignore the previous comment.. A better and simpler logic is: after got the persist value from
database and before show results on dashboard, we need to check if the persist value is consistent
with the services installed. Because at this point, upgrade or add/delete service might happened,
we need to delete or add related widgets then show them on dashboard.
                
> Ambari UI widgets should tolerate addition or removal of services
> -----------------------------------------------------------------
>
>                 Key: AMBARI-3064
>                 URL: https://issues.apache.org/jira/browse/AMBARI-3064
>             Project: Ambari
>          Issue Type: Bug
>          Components: client
>    Affects Versions: 1.4.0
>            Reporter: Xi Wang
>            Assignee: Xi Wang
>             Fix For: 1.4.1
>
>         Attachments: AMBARI-3064_2.patch, AMBARI-3064.patch
>
>
> When Ambari was upgraded from 1.2.5.17 to 1.4.0.18, MAPRDEDUCE was removed and YARN and
MAPREDUCE2 were added. 
> The persist value of widgets still had the widgets for MAPREDUCE due to which the dashboard
came up to empty.
> So, we need to update the persist value for the same user if stack has upgraded.

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