I have started a Nifi process(Consume Kafka) and connected it to a topic. It is running but I am not able to (don\'t know) where can I view the messages?
You might need to consume messages --from-beginning if those messages have been consumed before (and therefore offsets have been committed).
On GetKafka processor, there is a property Auto Offset Reset which should be set to smallest which is the equivalent of --from-beginning in Kafka Console Consumer.