In order to protect apisonator from DoS attacks, we are setting a limit of 12kb for URLs in incoming requests.

When such a long request is received, we are returning the status code 503, error.

It would be more appropriate to return the status 400, bad request.

The status code is returned by falcon before giving control to us, so I'm not sure we can fix it.

This is issue is about investigating how could we return a 400 in the described scenario.