Github user mattyb149 commented on the issue:
https://github.com/apache/nifi/pull/2778
+1 LGTM, I couldn't find anything promising about arrays of arrays in Avro,
I guess in order to determine types using an Avro schema, it has to have a
name, which means it has to be a record or something, so you can have arrays of
records of arrays or something...
Anyway ran with integration tests and with a live NiFi, things look good.
Thanks for the improvement! Merging to master---
