Not Acceptable error showing while calling response from ajax in SPRING

I am trying to get response in form of json array from controller class. When I tried to send request from javascript, I get "Not Acceptable" error. Please help to find b ug in my code.

This is my controller's code

@RequestMapping(value = "/ajaxvalue", method = { RequestMethod.GET }, produces=MediaType.APPLICATION_JSON_VALUE)
  public @ResponseBody Map<String, String> geResourceList(String name){
        logger.info("getAllResources() from ajax begins: ");
        Map<String, String> resourceMap = null;
        try {
            logger.info("getAllResources() from ajax begin: ");
            resourceMap = new HashMap<String, String>();
            List<ResourceModel> resourceList = resourceService
                    .getAllResources();
            java.util.Iterator<ResourceModel> resourceIterator = resourceList.iterator();
            while (resourceIterator.hasNext()) {
                ResourceModel model = resourceIterator.next();
                resourceMap.put("" + model.getResourceType(),
                        model.getName());
                logger.info("" + model.getResourceType(),
                        model.getName());
            }
            resourceMap.put("resourceType",
                    "BYE");
        } catch (Exception e) {
            logger.debug("Error while getting location in ajax request:"
                    + e.getMessage());
            e.printStackTrace();
        }logger.info("getAllResources() from ajax ENDS: ");
        return resourceMap;
    }

This is my jquery code.

jQuery.ajax({
url: '<c:url value='/learningresources/ajaxvalue'/>',
type: 'GET',
dataType:'json',
contentType: "application/json",
cache:false,
success:function(response){
    alert(response);
},
error:function(jqXhr, textStatus, errorThrown){
    alert("error: "+errorThrown);
}
});