How to convert a ',' comma separated file/text file into JSON format in apache nifi?

[#1 · Accepted solution]

As of NiFi 1.2.0 (via NIFI-3658), you can use ConvertRecord to achieve this. You would configure a CSVReader to match your CSV format (comma-delimited, possibly other config options around header line, quotes, etc.) and a JSONRecordSetWriter to output JSON.

Prior to NiFi 1.2.0, you could use ConvertCSVToAvro -> ConvertAvroToJSON.

[#2]

Thanks @Matt Burgess