Github user pvillard31 commented on the issue:
https://github.com/apache/nifi/pull/379
Closing this one as I don't have time to get back into it at the moment.
For anyone interested, it would at least be necessary to upgrade Alluxio
version to the latest. (@HorizonNet - I see you're in Alluxio's PMC, feel free
to chime in :))---
