Dmytro Grinenko created AMBARI-18609:

             Summary: Implement a way to configure Stack Upgrade Merger to skip 
particular properties to be merged from stack defaults
                 Key: AMBARI-18609
             Project: Ambari
          Issue Type: Bug
          Components: ambari-server
    Affects Versions: trunk
            Reporter: Dmytro Grinenko
            Priority: Critical
             Fix For: trunk

We need to reincarnate on-stack-upgrade feature in less functionality way. It's 
true, that we don't need an analog to Stack Advisor or Upgrade Packs, however 
we need a way to exclude some property from being merged with stack defaults 
during Upgrade.
Why we need this: there could be a lot of situations, when we need some 
properties only in some 
picante moments, and these properties regulated according to Stack 
Advisor/Wizards or another internal state. In this case, these properties 
shipped with dummy stack default values, which are incorrect.

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