SpringBoot compileAotJava Failed for Actuator and Webflux

A blank project created from the initializr using - Spring Boot 3 (RC2) - Actuator - Webflux

Generated the following error during build. I just started trying out Boot 3. This used to work on Boot 2.

> Task :compileAotJava FAILED
<removed>\build\generated\aotSources\org\springframework\boot\actuate\autoconfigure\endpoint\web\reactive\WebFluxEndpointManagementContextConfiguration__BeanDefinitions.java:72: error: ServerCodecConfigurerEndpointObjectMapperBeanPostProcessor has private access in WebFluxEndpointManagementContextConfiguration
  private static BeanInstanceSupplier<WebFluxEndpointManagementContextConfiguration.ServerCodecConfigurerEndpointObjectMapperBeanPostProcessor> getServerCodecConfigurerEndpointObjectMapperBeanPostProcessorInstanceSupplier(
                                                                                   ^
<removed>\build\generated\aotSources\org\springframework\boot\actuate\autoconfigure\endpoint\web\reactive\WebFluxEndpointManagementContextConfiguration__BeanDefinitions.java:74: error: ServerCodecConfigurerEndpointObjectMapperBeanPostProcessor has private access in WebFluxEndpointManagementContextConfiguration
    return BeanInstanceSupplier.<WebFluxEndpointManagementContextConfiguration.ServerCodecConfigurerEndpointObjectMapperBeanPostProcessor>forFactoryMethod(WebFluxEndpointManagementContextConfiguration.class, "serverCodecConfigurerEndpointObjectMapperBeanPostProcessor", EndpointObjectMapper.class);
                                                                              ^
<removed>\build\generated\aotSources\org\springframework\boot\actuate\autoconfigure\endpoint\web\reactive\WebFluxEndpointManagementContextConfiguration__BeanDefinitions.java:82: error: ServerCodecConfigurerEndpointObjectMapperBeanPostProcessor has private access in WebFluxEndpointManagementContextConfiguration
    Class<?> beanType = WebFluxEndpointManagementContextConfiguration.ServerCodecConfigurerEndpointObjectMapperBeanPostProcessor.class;

Comment From: crimsonvspurple

Just tested with 3.0.0-SNAPSHOT and it works there. Close if needed.

Comment From: bclozel

This has been resolved in #33106 Thanks for trying our RC versions!