Spring REST using Jackson - 400 bad request logging

Question

I have spring REST set up fine using Jackson/JSON and everything works.

But I knowingly introduced an error in the structure of the message which resulted in a 400 - Bad Request. But there was no log output on the server. The error I would be expecting would be something like "Jackson unknown property exception" or whatever but it was caught and a 400 error was sent to the client, but no log of the exception on the server.

I don't want to debug everything on the server clearly, but I want Spring network level exceptions like this clearly labelled as error.

What is the correct way to switch this on?

Answer 1

@ExceptionHandler
@ResponseStatus(HttpStatus.BAD_REQUEST)
public void handle(HttpMessageNotReadableException e) {
    logger.warn("Returning HTTP 400 Bad Request", e);
}