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.
I never worked with struts 2 but for 1.x, however could you see what the servlet converted from JSP (from the cache) is rendering as. May be the servlet might give more insight on -from where it is trying to read the content/message.
Have Fun with Java
little,little.. little by little makes a lot..