Github user olegz commented on the pull request:
https://github.com/apache/nifi/pull/357#issuecomment-211322321
Was able to validate that when/if someone attempts to delete a connected
processor a window pops up with the error message "Destination of Connection
(LogAttribute[id=7a37a5bb-1017-4732-8c31-a6c1f44eea18]) is running". So all
good, adequate tests provided, +1.
@mcgilman @scottyaslan perhaps in the future we can further address it (as
an additional feature) in the UI and disable "Delete" option all together.
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