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https://issues.apache.org/jira/browse/AMBARI-15783?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15234249#comment-15234249
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Matt commented on AMBARI-15783:
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[~jaimin] I think I know where the issue is. And I can come up with a fix for
this one within 24 hours.
> Assign Slaves and Clients Page: Incorrect validation error shown
> ----------------------------------------------------------------
>
> Key: AMBARI-15783
> URL: https://issues.apache.org/jira/browse/AMBARI-15783
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.2.2
> Reporter: Jaimin D Jetly
> Assignee: Matt
> Priority: Critical
> Labels: regresion
> Fix For: 2.2.2
>
>
> In certain combination of number of hosts and master component selection,
> incorrect validation error is shown on ui.
> Following STR is one of the way to reproduce the issue:
> *STR:*
> # On 2 node cluster, Change Metrics Collector from the default host to
> another host.
> # Click on next
> # Assign Slaves and Clients page has validation error saying
> {color:red}Metrics Monitor component should be installed on all hosts in
> cluster.{color}
> This happens because recommendation API called by ambari-web when user
> changed the host for Metrics collector does not have "Metrics Monitor"
> recommended for all hosts.
> *Expected behavior:* A component with cardinality "ALL" should be recommended
> on all hosts by component recommendation API irrespective of the data posted
> with the API.
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