@ResponseStatus, the client does not receive an error message

Question

I have code with a custom exception:

@ResponseStatus(value = BAD_REQUEST, reason = "Login is busy")
    public class LoginIsBusyException extends RuntimeException{
}

And a method that can throw it:

@RequestMapping(method = POST) 
public void registration(@RequestBody UserRest user) throws 
LoginIsBusyException{
  userService.checkAlreadyExist(user.getLogin(), user.getMail());
  user.setActive(false);
  UserRest userRest = userService.addUser(user);
  Integer randomToken = randomTokenService.getRandomToken(userRest.getMail());
  mailService.sendMail(randomToken, userRest.getLogin(), userRest.getMail());
}

The problem is that the client receives only the error code but does not receive the statusText "Login is busy", Already tried to add a method catching this exception

@ExceptionHandler(LoginIsBusyException.class)
public void handleException(HttpServletResponse response) throws IOException 
{
   response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Login is busy");
}

But, the message is lost somewhere and the customer gets this response:

Answer 1

You have missed @ResponseBody for your handleException method and also it returns void with your current code i.e., you are NOT passing the response body, as shown below:

@ResponseBody
@ExceptionHandler(LoginIsBusyException.class)
public String handleException(HttpServletResponse response) throws IOException 
{
   response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Login is busy");
}

or else you use ResponseEntity to produce both header and body as shown below

@ExceptionHandler(LoginIsBusyException.class)
public ResponseEntity<String> 
                handleException(LoginIsBusyException exe) {
   return ResponseEntity.status(HttpStatus.BAD_REQUEST).body("Login is busy");
}