Kafka分区再平衡spring for kafka

Question

I have a micro-service which is using spring for Kafka consumer using @KafkaListener with some group id. This application is deployed to the cloud with two instances in different regions.

So now i think the partition is divided among two consumers as they both have same group id.

Is there any possible way to assign all the partitions to a single instance. I don't want partition rebalance.

How to create customised offset using ConsumerRebalanceListener in spring kafka application?

Answer 1

You should be able to set partition.assignment.strategy property of the consumer to org.apache.kafka.clients.consumer.StickyAssignor

It's stated goal is

Guarantees an assignment that is maximally balanced while preserving as many existing partition assignments as possible.

I've personally not used it, but if I understand it's purpose correctly, if you start another consumer in the same group, there would not be rebalancing until that first consumer dies.