I have a same situation as yours.. i get the same exception. and this exception comes only to one of my entity beans. when others donot throw this exception.
I dont have a clue on this.. if you have solved it please post how did u do it.
My problem with this exception is , i cannot hotdeploy when this warning is there , I got to restart my server..
never mind ..I solved this problem..
I had one business method in my remote interface which was missing " throws RemoteException" clause..
so i think this warning occurs for errors in RemoteInterface.