json error response

[Vinh Nguyen (vinguye2)]

Hi,
 
I have a service that returns a custom data object.  It returns JSON
fine.  To handle errors, it throws a WebApplicationException whose
response body detail is from a JAXB object.  But the error response is
coming as XML.  What configuration is needed to get the error response
as JSON?
 
Thanks,
-Vinh