Ambiguous @ExceptionHandler method mapped for [class org.springframework.web.bind.MethodArgumentNotValidException]

Question

I\'m trying to handle MethodArgumentNotValidException using @ControllerAdvice as code given below:

@ControllerAdvice
public class RestResponseEntityException         


        

Answer 1

Springs ResponseEntityExceptionHandler has a method handleException which is annotated with :

@ExceptionHandler({     
        ...
        MethodArgumentNotValidException.class,
        ... 
    })

Your method handleMethodArgumentNotValidException is also annotated to handle MethodArgumentNotValidException. So spring finds two methods that should be used to handle the same exception, that is the reason for the exception.

**Solution ** Do not add a new method handleMethodArgumentNotValidException instead just override the method ResponseEntityExceptionHandler.handleMethodArgumentNotValid , and do not annotate it. Your class ErrorWrapper must extend ResponseEntity for that.