Change in installing exception mappers

[Benson Margulies]

Has the process of installing an exception mapper changed? My mappers
aren't being invoked.

sf.setProvider(new JacksonJaxbJsonProvider(JsonUtils.getObjectMapper(),
        JacksonJaxbJsonProvider.DEFAULT_ANNOTATIONS));
sf.setProvider(new JsonExceptionMapper());
sf.setProvider(new WebApplicationExceptionMapper());
sf.setProvider(new GenericExceptionMapper());