Thanks to the issue created by @svenvk this was at least partially addressed in NiFi 2.8.0. The problem was that newer Avro/Parquet libraries are using Java 8 Datatypes instead of Long/Integer to represent timestamps. I say partially, because the fix only implements the Avro types: time-millis time-micros timestamp-millis timestamp-micros Missing is the type for nanosecond precision "timestamp-nanos" as well as the three "local-timestamp-{millis,micros,nanos}" types. See https://avro.apache.org/docs/1.12.0/specification/#timestamps  Additionally, the new parquet viewer when displaying a flow file seems to suffer from the same problem that created the error described here. I will create new issues in the NiFi Jira 🙂   ... View more