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https://issues.apache.org/jira/browse/AMBARI-12049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14594814#comment-14594814
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Andrii Tkach commented on AMBARI-12049:
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+1 for the patch
> Host can be deleted despite some required masters are present
> -------------------------------------------------------------
>
> Key: AMBARI-12049
> URL: https://issues.apache.org/jira/browse/AMBARI-12049
> Project: Ambari
> Issue Type: Bug
> Components: ambari-web
> Affects Versions: 2.1.0
> Reporter: Antonenko Alexander
> Assignee: Antonenko Alexander
> Priority: Critical
> Fix For: 2.1.0
>
> Attachments: AMBARI-12049.patch, deletingHost.png
>
>
> # Deployed cluster
> # Tried to delete host
> # Watch screenshot attached - Wizard says, that host cannot be deleted since
> it has the following master components :
> DRPC Server, Falcon Server, History Server, Metrics Collector, NameNode.
> # But, on background you can see, that there are such masters like Knox
> Gateway or Accumulo Master, for example. These masters have cardinality 1+ in
> metainfo.xml, but not mentioned in wizard and host can be deleted with them.
> (On cluster there was only 1 Knox Gateway and 1 Accumulo Master, on mentioned
> host)
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