[jira] [Created] (AMBARI-5618) Validate that a host is only associated with a single host group when provisioning via a blueprint

["John Speidel (JIRA)" <ji...@apache.org>]

John Speidel created AMBARI-5618:
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             Summary: Validate that a host is only associated with a single host group when provisioning via a blueprint
                 Key: AMBARI-5618
                 URL: https://issues.apache.org/jira/browse/AMBARI-5618
             Project: Ambari
          Issue Type: Improvement
            Reporter: John Speidel
            Assignee: John Speidel
             Fix For: 1.6.0


When provisioning a cluster via a blueprint, there currently is a restriction that a host may only be associated with a single host group.  If a user attempts to map a host to multiple host groups, strange errors are reported back to the user which do not explain the problem.

This work will validate that a host is only mapped to one host group early and will provide a good error message to the user if there is an attempt to map multiple host groups to a host.

{
  "status" : 400,
  "message" : "A host may only be mapped to a single host group at this time.  The following hosts are mapped to more than one host group: [john2.novalocal]"
} 



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