Jersey: Returning 400 error instead of 500 when given invalid request body

Question

I\'m using Jersey\'s integrated Jackson processing to transform incoming JSON to a POJO, e.g.:

@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response newCus         


        

Answer 1

I tried mapping status 500 to status 400 with HolySamosa's answer but the exception was not caught by this mapper, and status 500 was still being returned.

After debugging I found that JsonParseException is being thrown and not UnrecognizedPropertyException. This is because I was sending some garbage text (that was not JSON at all).

When I sent a proper JSON from client side, with format that was not appropriate for my DTO on the server side, then I got UnrecognizedPropertyException. So there are two cases for this:

• when you send garbage that is not JSON and
• when you send JSON, but it is not a match for your DTO class.

Now I am returning status 400 for both.