[Spring][Exception] Controller Ambiguous mapping

나의 오류 내용

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.config.annotation.web.configuration.WebSecurityConfiguration': Injection of autowired dependencies failed
...
Caused by: java.lang.RuntimeException: Could not postProcess org.springframework.security.config.annotation.web.builders.WebSecurity@443d94ae of type class org.springframework.security.config.annotation.web.builders.WebSecurity
...
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 'reservationController' method 
com.zb.deuggeun.reserve.controller.ReservationController#cancel(Long)
...
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 'reservationController' method 
com.zb.deuggeun.reserve.controller.ReservationController#cancel(Long)
to {PUT [/reservation/{reservationId}/complete]}: There is already 'reserveController' bean method
com.zb.deuggeun.reserve.controller.ReserveController#complete(Long) mapped.

처음에 젤 위쪽만 보고 security문제인가? 했었는데 아래쪽을 보고는 컨트롤러에서 문제가 있었던 것을 알 수 있었다.

해결

As-is

@PutMapping("/{reservationId}/complete")
public Dto complete() {}

@PutMapping("/{reservationId}/complete")
public Dto cancel() {}

코드를 확인해본 결과 mapping을 중복되게 작성한 것이다.

To-be

@PutMapping("/{id}/complete")
public Dto complete() {}

@PutMapping("/{id}/cancel")
public Dto cancel() {}

중복이 안되게 수정을 해주어서 해결했다.