Rob Fellows created NIFI-6735:
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             Summary: Updating parameter used by running processor can result 
in the processor not restarting because it doesn't wait for validation to 
complete.
                 Key: NIFI-6735
                 URL: https://issues.apache.org/jira/browse/NIFI-6735
             Project: Apache NiFi
          Issue Type: Bug
          Components: Core Framework
    Affects Versions: 1.10.0
            Reporter: Rob Fellows
            Assignee: Rob Fellows
         Attachments: Processor fails to restart.png

There is a timing issue when updating a parameter that is referenced by a 
running processor. Updating the parameter context stops the processor and tries 
to restart it. However, validation of the processor might not be complete by 
the time it is attempted to be restarted and you can get an error (see attached 
image) and the processor does not restart automatically.



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