This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
There is a resource reference given in the web.xml. The server checks whether the jndi reference is there in the server's jndi context while deploying. It seems to me like you are trying to run your first struts app. If so comment the resource reference that you have given in the web.xml.