Github user mattyb149 commented on the issue:
https://github.com/apache/nifi/pull/2175
So it is Elasticsearch that is treating "not found while deleting"
differently than "not found while updating", they return different status codes
with the "error" message in different fields in the JSON. This PR checks for
both. I'm waffling on whether to treat them as errors, I think I'd like to keep
them as not errors (see my comment above).
@MikeThomsen 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.
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