As pointed out by @maciejwalkowiak in #32763, there are a number of @Bean methods in KafkaAutoConfiguration where the return type isn't as specific as it could be. For example, kafkaConsumerFactory always returns a DefaultKafkaConsumerFactory but its return type is only ConsumerFactory.

See #32766

Comment From: pivotal-cla

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Comment From: YuanHao97

I don't have access to CI build detail, not sure why CI build failed. The unit test KafkaAutoConfigurationTests works fine locally.