Getting acks = -1 when I set acks to all in my Kafka producer

Question

I set the following property on my Kafka producer:

properties.setProperty(ProducerConfig.ACKS_CONFIG, "all");

When I start my application I see acks = -1 in the ProducerConfig values . Why is this?

Answer 1

For producer config, acks property of -1 is equal to all .

Producer config from Kafka documentation:

acks=all This means the leader will wait for the full set of in-sync replicas to acknowledge the record. This guarantees that the record will not be lost as long as at least one in-sync replica remains alive. This is the strongest available guarantee. This is equivalent to the acks=-1 setting .