为 Kafka Consumer 随机生成的组 ID

Question

We have an application that uses spring kafka to read messages. It is necessary that each instance of the application has a unique groupId, as well as reset it and get a new one on restart. The GroupId is randomly generated via ${random.uuid} .

Is the solution to generate randomly id really correct?

Answer 1

Yes, generating through ${random.uuid} is correct.

spring.kafka.consumer.group-id=${random.uuid}

There is also another choice if you want more control over the way the group id is generated. Use the @KafkaListener annotation with a Spring expression. From the Spring Kafka reference :

You can configure most attributes on the annotation with SpEL by using #{…} or property placeholders (${…}). See the Javadoc for more information.

@KafkaListener(topics = "hi", groupId = "#{T(java.util.UUID).randomUUID().toString()}")