Spring Framework BeanPostProcessorChecker: warning logs about BeanPostProcessors

[space88man]

The context
Spring Framework's BeanPostProcessorChecker has started to complain loudly
(logs at WARN level) about the BeanPostProcessors in this repo.

Creating a Spring Boot application that hosts a gRPC server and
uses multiple gRPC client stubs to access services. Spring Boot version: 3.3.2

Both client and server auto-configurations classes trigger the checker.
The bug

Warnings:

2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker Bean 'net.d
evh.boot.grpc.client.autoconfigure.GrpcClientAutoConfiguration' of type [net.devh.boot.grpc.client.autoconfigure.GrpcClientAutoConfiguration]
 is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying). Is this bean getting eagerly 
injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and 
its dependencies.

2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker Bean 'net.d
evh.boot.grpc.server.autoconfigure.GrpcServerAutoConfiguration' of type [net.devh.boot.grpc.server.autoconfigure.GrpcServerAutoConfiguration]
 is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying). Is this bean getting eagerly 
injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and 
its dependencies. 

Stacktrace and logs

N/A - application does start up
Steps to Reproduce

The application's environment

Which versions do you use?

• Spring (boot): 3.3.2
• grpc-java: 1.63.0
• grpc-spring-boot-starter: 3.1.0.RELEASE
• java: version + architecture (64bit?) 21/x86_64
• Other relevant libraries...

Additional context

• Spring Boot suggests this is due to the way grpcClientBeanPostProcessor is declared: FlywayAutoConfiguration is triggering framework's BeanPostProcessorChecker: not eligible for getting processed by all BeanPostProcessors spring-projects/spring-boot#41656 (comment)
• this repo declares these warnings as a non-issue: Bean is not eligible for getting processed by all BeanPostProcessors spring-cloud/spring-cloud-commons#1332
• complete list of "complaints":

2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'net.devh.boot.grpc.client.autoconfigure.GrpcClientAutoConfiguration' of type [net.devh.boot.grpc.client.autoconfigure.GrpcClientAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'net.devh.boot.grpc.server.autoconfigure.GrpcServerAutoConfiguration' of type [net.devh.boot.grpc.server.autoconfigure.GrpcServerAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'defaultGrpcServerProperties' of type [net.devh.boot.grpc.server.config.GrpcServerProperties] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'selfNameResolverFactory' of type [net.devh.boot.grpc.server.nameresolver.SelfNameResolverFactory] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'grpcNameResolverRegistration' of type [net.devh.boot.grpc.client.nameresolver.NameResolverRegistration] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'grpcChannelsProperties' of type [net.devh.boot.grpc.client.config.GrpcChannelsProperties] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'globalClientInterceptorRegistry' of type [net.devh.boot.grpc.client.interceptor.GlobalClientInterceptorRegistry] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'net.devh.boot.grpc.common.autoconfigure.GrpcCommonCodecAutoConfiguration' of type [net.devh.boot.grpc.common.autoconfigure.GrpcCommonCodecAutoConfiguration] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'defaultGrpcCodecDiscoverer' of type [net.devh.boot.grpc.common.codec.AnnotationGrpcCodecDiscoverer] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'defaultCompressorRegistry' of type [io.grpc.CompressorRegistry] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'compressionChannelConfigurer' of type [net.devh.boot.grpc.client.autoconfigure.GrpcClientAutoConfiguration$$Lambda/0x00007fc7f8549a38] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'defaultDecompressorRegistry' of type [io.grpc.DecompressorRegistry] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'decompressionChannelConfigurer' of type [net.devh.boot.grpc.client.autoconfigure.GrpcClientAutoConfiguration$$Lambda/0x00007fc7f854a568] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'shadedNettyGrpcChannelFactory' of type [net.devh.boot.grpc.client.channelfactory.InProcessOrAlternativeChannelFactory] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'annotationGlobalClientInterceptorConfigurer' of type [net.devh.boot.grpc.client.interceptor.AnnotationGlobalClientInterceptorConfigurer] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'asyncStubFactory' of type [net.devh.boot.grpc.client.stubfactory.AsyncStubFactory] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'blockingStubFactory' of type [net.devh.boot.grpc.client.stubfactory.BlockingStubFactory] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 
2024-07-31T10:19:01 WARNING [main] org.springframework.context.support.PostProcessorRegistrationDelegate$BeanPostProcessorChecker
    Bean 'futureStubFactory' of type [net.devh.boot.grpc.client.stubfactory.FutureStubFactory] is not eligible for getting processed by all BeanPostProcessors
    (for example: not eligible for auto-proxying). Is this bean getting eagerly injected into a currently created BeanPostProcessor [grpcClientBeanPostProcessor]? Check the corresponding BeanPostProcessor declaration and its dependencies. 

[space88man]

Not specific to this repo: I am seeing this warning for other autoconfiguration classes. E.g
spring-projects/spring-boot#38558. It's not a Spring Boot issue
but due to changes in Spring Framework
spring-projects/spring-boot#39224 (comment)

[Electric-impala]

I also encountered same issue. How can we get rid off these warn logs? @space88man did you got any solution

[anandrathnauni]

I was using the following

implementation 'net.devh:grpc-server-spring-boot-starter:3.1.0.RELEASE'
implementation 'net.devh:grpc-client-spring-boot-starter:3.1.0.RELEASE'

I had to downgrade them

implementation 'net.devh:grpc-server-spring-boot-starter:3.0.0.RELEASE'
implementation 'net.devh:grpc-client-spring-boot-starter:3.0.0.RELEASE'

Also had the following strictly on specific versions

    implementation('io.grpc:grpc-api') {
        version {
            strictly '1.63.0'
        }
    }
    implementation('io.grpc:grpc-protobuf') {
        version {
            strictly '1.63.0'
        }
    }

    implementation('io.grpc:grpc-stub') {
        version {
            strictly '1.63.0'
        }
    }

    implementation('org.springframework:spring-webmvc') {
        version {
            strictly '6.1.13'
        }
    }