Brandon Panna created NIFI-9921:
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             Summary: Parameter context referencing components not detecting 
UpdateAttribute advanced usage
                 Key: NIFI-9921
                 URL: https://issues.apache.org/jira/browse/NIFI-9921
             Project: Apache NiFi
          Issue Type: Bug
    Affects Versions: 1.16.0
         Environment: Centos 7, Standalone NiFi node
            Reporter: Brandon Panna


Parameters defined in Parameter Context and used in the UpdateAttribute 
Advanced section are not listed in the Parameter Context referencing components 
list. No listing is produced by usage in either conditions or actions.

Issue 1.

Reproduce:
 # Create two parameters in Parameter Context:
 ## conditionsTestParam:true
 ## actionsTestParam:myValue
 # Create a rule in UpdateAttribute advanced
 ## Expression: ${#\{conditionsTestParam}:equals('true')}
 ## Actions: Att=outputFromAction Value=${#\{actionsTestParam}}
 # Run flowfile though processor
 # Flowfile attribute now has a new attribute outputFromAction with value 
myValue
 # Check Parameter Context panel

Expectations:

Referencing Components should list UpdateAttribute processor

A related issue, deleting the parameter doesn't cause the referencing 
UpdateAttribute processor to disable.



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