How can I effectively bind my @KafkaListener to ConcurrentKafkaListenerContainerFactory?

Question

I hit this scenario which appears strange to me:

So basically I have defined two @KafkaListener in one class:

Answer 1

It's because consumerFactory is a singleton @Bean and the arguments are ignored on the second call.

Add @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE) to the factory get a new bean each time.

However, you don't need any of this, you can simply set the groupId property on the annotations and avoid all this extra definition.

You can also control autoStartup on the annotation (since 2.2).

EDIT

To answer the question in the comment below...

groupId = "#{'${group.id}' + T(java.time.Instant).now().toEpochMilli()}"

however, if you want a unique group id; this is more reliable...

groupId = "#{'${group.id}' + T(java.util.UUID).randomUUID()}"