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From Ambari 2.4, each service can choose to define it its own service advisor rather than define the details of its configuration and layout in the stack advisor.  This is particularly useful for custom services which are not defined in the stack.  Ambari provides the Service Advisor capability where a service can write a Python script named service-advisor.py in their service folder. This folder can be in the stack's services directory where the service is defined or can be inherited from the service definition in common-services or elsewhere.  Example: common-services/HAWQ/2.0.0.

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