Github user markap14 commented on the issue:
https://github.com/apache/nifi/pull/2416
I would not consider that circumstance to be unusual, but rather a common
scenario if power is lost, after NIFI-4775 has been implemented. Given that
NIFI-4775 was created and that there were no objections, I considered that
verification that it is intended to be implemented in the future. Once this is
done, it will guarantee no loss of data (though it would allow loss of
processing). The proposed solution, however, still results in data loss if
power is lost, but also prevents us from implementing NIFI-4775 effectively
because once it is implemented it would provide us no real benefit with such a
solution, as it would still throw out those fsync'ed CREATE events if another
partition was not also fsync'ed.
---
