Kafka batch listener incorrect deserializing message

Question

I am using batch listening with following configuration but my message wrongly deserialise :

@KafkaListener(
    id = \"${kafka.buyers.product-sales-pricing.         


        

Answer 1

In your case you missed one configuration for batch listening:

spring:
  kafka:
    listener:
    type: BATCH # this configuration is required in spring boot application without this spring boot return single message(without batch)
    fetch-min-size: 10 # without this you will get 1 message some time but this is optional in your case.

I bet that in your problem your configuration will work if you remove List from kafkaListner class.

Hope this helps you.