Call to webservice returning with a response status 500 throws UniformInterfaceException

[Abhishek Asthana]

Hi

I created a small webservice using Jersey framework. I added couple of methods in the service. Below is the code:

@Path("/users/")
public class UsersResource {

    @Context
    UriInfo uriInfo;
    ArrayList<UserResource> usersList = new ArrayList<UserResource>();

    @GET
    @Path("{userid}/")
    public UserResource getUser(@PathParam("userId") String userid) {
        ArrayList usersList = getUsers();
        UserResource user = (UserResource)usersList.get(Integer.parseInt(userid));
        return user;
    }

    @GET
    @Produces("application/json")
    public JSONArray getUsersAsJsonArray() {
        JSONArray uriArray = new JSONArray();
        ArrayList<UserResource> usersList = getUsers();
        for (UserResource user : usersList) {
            
            UriBuilder ub = uriInfo.getAbsolutePathBuilder();
            URI userUri = ub.path(""+user.getUserId() ).build();
            uriArray.put(userUri.toASCIIString());
        }
        return uriArray;
    }
}

I try to access the service using following client code:

ClientConfig cc = new DefaultClientConfig();
            Client c = Client.create(cc);

            WebResource wr = c.resource(UrlBase);

            System.out.println("Getting list of users:");
            JSONArray users = wr.path("users/").accept("application/json").get(JSONArray.class);
            System.out.println(String.format("List of users found:\n%s", users.toString()));
            System.out.println("-----");

            System.out.println("Getting test user before update:");
            JSONObject user = wr.path("users/8").get(JSONObject.class);
            System.out.println(String.format("User found:\n%s", user));
            System.out.println("-----");

The first method succeeds and gives list of users but second call fails with following exception:

TEST FAILED! :-(
com.sun.jersey.api.client.UniformInterfaceException: GET http://localhost:8084/TimerService/resources/users/8 returned a response status of 500
        at com.sun.jersey.api.client.WebResource.handle(WebResource.java:563)
        at com.sun.jersey.api.client.WebResource.get(WebResource.java:179)
        at domainobjects.Main.main(Main.java:63)

I am not able to understand what is wrong here. I tried changing the path also users/8 and users/8/ both fail.
Can someone please give any clues?

Thanks
Abhishek