Please review, and let me know if after reading up on the subject..the code doesn't make sense. At a high-level, DWR is the framework that populates the "response" parameter in that method, if its null…that means either DWR isn't being called/failing…or your service definition is faulty. Hope this helps,
I had debug the method in getDiscussions method in Utils class and verify that the return values for getDiscussions are a list of thread object. I will read the document given. Do you have any idea likely the error came from? I am running out of time to complete project and I am behind the progress.