PublisherAnnotationBeanPostProcessor has dependency on itself, breaks when using Spring Boot

[kewne]

If I declare the following configuration class in a Spring Boot application:

@Configuration
@EnablePublisher
public class IntegrationConfiguration

the application fails to start because the instantiated PublisherAnnotationBeanPostProcessor requests itself as a bean.

By default, Spring Boot disallows this unless you set spring.main.allow-circular-references: true, which IMO you shouldn't do without a good reason.

Expected behavior

No circular dependency error should be raised.

PublisherAnnotationBeanPostProcessor could still check for a duplicate with an explicit bean request;
perhaps just checking whether a definition exists would be enough.

[artembilan]

Confirmed:

2021-12-14 10:18:17.182 ERROR 3896 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

The dependencies of some of the beans in the application context form a cycle:

┌──->──┐
|  org.springframework.integration.internalPublisherAnnotationBeanPostProcessor
└──<-──┘

[kewne]

Just wanted to leave a (late) note of appreciation for taking the time to fix this, thank you very much 🙇