Idempotent Kafka Producer writing to multi-partitioned topic

Question

Does an idempotent producer have to be transactional in order to ensure idempotency when publishing to a multi-partitioned topic? After reading Kafka documentation I am still unsure if it does or not.

My environment is Kafka 1.0 cluster and Kafka 1.1 client.

Answer 1

Idempotent producer create an id which is send with the messages. With this id, the lead broker is able to say 'Oh, I already treated this message'.

Idempotent producer and transactional messaging are two different approaches of making a exactly-once messaging semantics.

So, no !