Github user JPercivall commented on the issue:
https://github.com/apache/nifi/pull/490
@pvillard31 I think you should be able to leverage the checksum in order to
check if the file that is there is the one that was previously read. Maybe
convert the logic found
[here](https://github.com/apache/nifi/blob/d3d59d58a51ded47ba1b7ebf87a79f678ab41cf2/nifi-nar-bundles/nifi-standard-bundle/nifi-standard-processors/src/main/java/org/apache/nifi/processors/standard/TailFile.java#L791-L791)
into it's own function and reuse it. This might need to be a configurable
property though (not sure about the performance implications, esp for an
extreme corner case).
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