[jira] [Created] (AMBARI-18415) Stack definition: service component 'cardinality' inheritance not working properly

["Andrew Onischuk (JIRA)" <ji...@apache.org>]

Andrew Onischuk created AMBARI-18415:
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             Summary: 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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