springfox-swagger2:3.0.0-SNAPSHOT Generates conflict of the beans 'requestMappingHandlerAdapter

[josuemojena]

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APPLICATION FAILED TO START

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Description:

The bean 'requestMappingHandlerAdapter', defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class], could not be registered. A bean with that name has already been defined in class path resource [org/springframework/web/reactive/config/DelegatingWebFluxConfiguration.class] and overriding is disabled.

Action:

Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true

Process finished with exit code 1

[dilipkrish]

Not sure what's causing this. Does the error go away when you remove springfox-swagger2? Is this a spring boot app?

Would you be able to create a failing test or replicate it here fixed? so this can be fixed.

[ghost]

Have the same issue. It's caused probably by the fact that people who had spring boot version below 2.2.X or below within their projects and were using springfox 3.0.0-SNAPSHOT after upgrade have spring-boot conflict. Springfox is using spring boot 2.3.1 now that's why there is such issue.

If someone is using only webflux stack then he should get above issue cause webmvc is included as well and there is a spring boot autoconfiguration conflict

[mfalowski]

springfox-* seems to use webmvc which causes problems on reactive stack. I've noticed you have made changes in that area recently c9b41dc#diff-4fe0b8294479ac5f5c20c7604ab4cece

[josuemojena]

No estoy seguro de qué está causando esto. ¿El error desaparece cuando elimina springfox-swagger2? ¿Es esta una aplicación de arranque de primavera?

¿Sería capaz de crear una prueba fallida o replicarla aquí arreglada ? así que esto se puede arreglar.

Not sure what's causing this. Does the error go away when you remove springfox-swagger2? Is this a spring boot app?

Would you be able to create a failing test or replicate it here fixed? so this can be fixed.

Not sure what's causing this. Does the error go away when you remove springfox-swagger2? Is this a spring boot app?

Would you be able to create a failing test or replicate it here fixed? so this can be fixed.

The problem happens to me using spring boot 2.3.0 and springfox-swagger2:3.0.0-SNAPSHOT, once I remove the springfox dependency it works as it should.

[pmrocha-mindera]

you need to add

spring.main.web-application-type=reactive

to your application.properties

[josuemojena]

you need to add

spring.main.web-application-type=reactive

to your application.properties

Thanks, I solved that way, although it doesn't render the endpoints, it says the following:

"Unable to render this definition
The provided definition does not specify a valid version field.

Please indicate a valid Swagger or OpenAPI version field. Supported version fields are swagger: "2.0" and those that match openapi: 3.0.n (for example, openapi: 3.0.0)."

[pmrocha-mindera]

@josuemojena are you setting the DocumentationType.SWAGGER_2 when you initialize a new Docket?

[josuemojena]

@josuemojena are you setting the DocumentationType.SWAGGER_2 when you initialize a new Docket?

Yes, I do.

[josuemojena]

@josuemojena are you setting the DocumentationType.SWAGGER_2 when you initialize a new Docket?

Look at this.

[pmrocha-mindera]

@josuemojena try to downgrade to 2.10.5 and see if that solves your issue

[josuemojena]

@pmrocha-mindera I can't, because it doesn't support webflux

[pmrocha-mindera]

@josuemojena it does, 2.10.5 is the latest stable version of the old 3.0.0 snapshot, as their are upgrading the snashopt and some things are in a W.I.P. state they released the 2.10.5

[dilipkrish]

Thanks everyone for

Have the same issue. It's caused probably by the fact that people who had spring boot version below 2.2.X or below within their projects and were using springfox 3.0.0-SNAPSHOT after upgrade have spring-boot conflict. Springfox is using spring boot 2.3.1 now that's why there is such issue.

If someone is using only webflux stack then he should get above issue cause webmvc is included as well and there is a spring boot autoconfiguration conflict

This is an inadvertent change. I'll fix this. Thank you everyone for jumping in with the explanation! Y'all rock!🤘

[dilipkrish]

If y'all are using spring boot, remove the explicit dependency on swagger2 and add just the dependency on springfox-boot-starter and remove any explicit annotations like @EnableSwagger2WebFlux etc. let me know if that is any better.

[josuemojena]

@josuemojena it does, 2.10.5 is the latest stable version of the old 3.0.0 snapshot, as their are upgrading the snashopt and some things are in a W.I.P. state they released the 2.10.5

Thank you, that's how I solved my problem.

[dilipkrish]

This should now be fixed