Ambiguous mapping. Cannot map '*Controller' method

Caused by: java.lang.RuntimeException: Could not postProcess org.springframework.security.config.annotation.web.builders.WebSecurity@61d4155b of type class org.springframework.security.config.annotation.web.builders.WebSecurity
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcHandlerMappingIntrospectorRequestTransformer': Cannot resolve reference to bean 'mvcHandlerMappingIntrospector' while setting constructor argument
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcHandlerMappingIntrospector' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Ambiguous mapping. Cannot map 'userController' method 
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Ambiguous mapping. Cannot map 'userController' method 
Caused by: java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'userController' method 
Execution failed for task ':TradingMatchingServiceApplication.main()'.
> Process 'command 'C:\Users\user\.jdks\openjdk-21.0.1\bin\java.exe'' finished with non-zero exit value 1

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BUILD FAILED in 3s
3 actionable tasks: 2 executed, 1 up-to-date

 

스프링부트에 JWT source를 넣고 회원가입 컨트롤러를 만들기위해 UserController를 작성 중
Could not postProcess org.springframework.security.config.annotation.web.builders.WebSecurity 에서 에러가 발생했다.

찾아보니 웹에 관련된 어노테이션이나 매핑 중복이 원인이라고 하여 프로젝트내 중복을 찾아보았다.

 

해결

다른 컨트롤러에 같은 api 경로가 있어 중복으로 인한 에러였다. 중복된 경로를 수정하여 해결하였다.

   예))
   @GetMapping("/hello") // /hello라는 매핑경로가 다른 컨트롤러에도 존재
    public ResponseEntity<String> hello() {
        return ResponseEntity.ok("hello");
    }