Spring MVC with WebLogic 10.3.4 - getting an HTTP 406 on GET request w/ @ResponseBody

Hi there. I am building a Spring-MVC application with Spring 3.1.1 and I am using Jackson 2.0.1 and I have a controller that uses the @ResponseBody annotation to return JSON.

Code:

---

    @RequestMapping(value="/roleMaint/role/roleTypes", method = RequestMethod.GET)
    public @ResponseBody List<Model> getRoleTypes() {

        List<Model> roleModels = new ArrayList<Model>();

        List<RoleType> roleTypes = Arrays.asList(RoleType.values());
        for (RoleType roleType : roleTypes) {
            ExtendedModelMap model  = new ExtendedModelMap();
            model.addAttribute("name", roleType.name());
            roleModels.add(model);
        }
        return roleModels;
    }

---

I have the following items in my servlet configuration

Code:

---

    <mvc:annotation-driven/>
    <mvc:default-servlet-handler/>

---

When I execute a GET request, I get an HTTP 406 from WebLogic 10.3.4, which is the Java container I am deploying too - if I deploy the same application to WebLogic 12.0.0.1, the application works and so I am sure this is something to do with WebLogic 10.3.4 and some versions of Jars that are bundled within WebLogic.

Any ideas on thinks I can try here? Thanks in advance.

--Vinny