Andrew Onischuk updated AMBARI-18415:
    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Committed to trunk and branch-2.5

> Stack definition: service component 'cardinality' inheritance not working 
> properly
> ----------------------------------------------------------------------------------
>                 Key: AMBARI-18415
>                 URL: https://issues.apache.org/jira/browse/AMBARI-18415
>             Project: Ambari
>          Issue Type: Bug
>            Reporter: Andrew Onischuk
>            Assignee: Andrew Onischuk
>             Fix For: 2.5.0
>         Attachments: AMBARI-18415.patch
> In the stack definition if a property of service component is not defined in
> one specific version than it will be inherited from the parent version.
> The `ComponentInfo.cardinality` always has a default value of "0+" from the
> moment the object is instantiated thus the inheritance logic is never applied.
> This leads to if a specific version of a service component doesn't have a
> property set in stack definition it won't inherit it from its parent but
> rather will take the "0+" default value.
> This is not the correct behaviour. First the inheritance should be applied and
> only set `cardinality` to "0+" only if it can't be inherited from the parents
> (as it's not defined in any of the parents up in the inheritance chain)

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