Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource
스프링 에러 메시지
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.security.config.annotation.web.configuration.WebSecurityConfiguration': Unsatisfied dependency expressed through method 'setFilterChains' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'filterChain' defined in class path resource [com/example/backend/global/config/SecurityConfig.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.security.web.SecurityFilterChain]: Factory method 'filterChain' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mvcHandlerMappingIntrospector' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'socialingController' method
급해서 내 코드를 복붙해서 갖다쓰니까 이런 문제가 발생했다..
컨트롤러의 매핑 경로가 중복되어서 발생한 오류라서 그냥 경로 또는 메서드를 바꿔주면 된다.