@RestControllerAdvice @ExceptionHandler Inconsistent behavior with @RestControllerEndpoint

[christophejan]

Currently, using RestControllerAdvice ExceptionHandler with RestControllerEndpoint give the following result :

1. Webflux using same management port : ExceptionHandler take in account
2. Webflux using different management port : ExceptionHandler take in account
3. Mvc using same management port : ExceptionHandler take in account
4. Mvc using different management port : ExceptionHandler ignored

See tests in attached demo-exception-handler-rest-controller-endpoint.zip

It seems inconsistent to me.

spring-boot version : 2.6.7

[wilkinsona]

Thanks very much for the minimal yet really comprehensive sample, @christophejan. I believe the difference in behaviour that you are seeing is because org.springframework.boot.actuate.autoconfigure.web.servlet.CompositeHandlerExceptionResolver does not consider a parent bean factory when finding HandlerExceptionResolver beans. We probably just need switch to using BeanFactoryUtils.beansOfTypeIncludingAncestors(ListableBeanFactory, Class<T>) instead but I'd like to check with the rest of the team first as my memory's a little hazy.

[wilkinsona]

We're going to try switching to BeanFactoryUtils.beansOfTypeIncludingAncestors.

[philwebb]

Closing in favor of PR #31495