public static UserGroupInformation getCurrentUserGroup() {
   if (g_CurrentUserGroup == null) {
     //            throw new UnsupportedOperationException("Uncomment when using version 1.0.*");
     String user = RemoteUtilities.getUser();
     //     user = "******";
     g_CurrentUserGroup = UserGroupInformation.createRemoteUser(user);
   }
   return g_CurrentUserGroup;
 }