Github user bbende commented on the issue:
https://github.com/apache/nifi/pull/2527
I think when I initially implemented this processor I was assuming someone
would be fetching rows that were expected to be there, so if it wasn't there
then it would be more an error scenario.
However, looking back on it now... since we do have the explicit not found
relationship, it is going to be obvious when something is not found, and we can
use LogMessage as Pierre mentioned if we need to generate a bulletin there. So
I'm ok with changing it to debug.
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