Github user MikeThomsen commented on the issue:
https://github.com/apache/nifi/pull/2175
> Are you seeing "not-found-updates" as failures, and "not-found-deletes"
as successful? If so then are you ok with that behavior? I'm tending towards
keeping it that way.
Absolutely. I think it is natural behavior and makes validating flows
easier. For example, if you run through a bulk delete once and then replay it
to verify nothing was left, you don't want a success message in the first case
and a failure message in the latter if both deletes cleanly executed.
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