sql - latest changes are not reflecting till restart -

I am preparing a dynamic website in Eclipse. But when I am making changes in JSP and I am running, it is going fine for the first time, when I make changes and I restart the server and I run it, the changes are made and I am fully assumed to see the changes Requires restarting from / P>

Running me for the first time gives me an error.

  java.sql.SQLException: [Microsoft] [ODBC excel driver] External table is not in relatively format Java.lang.NullPointerException  

Corrected the server and ran the server again, the server is still the same. I do not keep errors when i restart the eclipse.

How do I update and see changes without taking it?

Thanks