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changes.mady.by.user Jeff Sposetti

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You could look at this method for more details: org.apache.ambari.server.api.util.StackExtensionHelper#mergeServices

For more information see the Service Inheritance wiki page.

If a component is missing in the new definition but is present in the parent, does it get inherited?
 

Generally yes.

Configuration dependencies for the service -- are they overwritten or merged?

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