data publish seq start from 0; use exception to indicate error in getting the
seq for a prefix
diff --git a/test/test_app_socket.cc b/test/test_app_socket.cc
index f6edc61..f5b7384 100644
--- a/test/test_app_socket.cc
+++ b/test/test_app_socket.cc
@@ -40,6 +40,7 @@
   map<string, string> data;
   void set(string str1, string str2) {
     data.insert(make_pair(str1, str2));
+		cout << "Got: "<< str1 <<" => "<< str2 <<endl;
   }
 
   string toString(){