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https://issues.apache.org/jira/browse/AMBARI-6677?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14079438#comment-14079438
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Andrii Tkach commented on AMBARI-6677:
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+1 for the patch.
> Addable and deletable components should be derived from cardinality field
> --------------------------------------------------------------------------
>
> Key: AMBARI-6677
> URL: https://issues.apache.org/jira/browse/AMBARI-6677
> Project: Ambari
> Issue Type: Bug
> Components: client
> Affects Versions: 1.7.0
> Reporter: Andrii Babiichuk
> Assignee: Andrii Babiichuk
> Fix For: 1.7.0
>
> Attachments: AMBARI-6677.patch
>
>
> Currently, StackServiceComponent model hard-codes the list of service
> components that can be added or deleted to a host.
> Instead of maintaining a list, we should derive the logic for allowing
> addition or deletion of a host component via cardinality field.
> For deletable master components, Let zookeeper server be the only component
> that can be deleted.
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