I created an application with Struts2 and Spring. It worked perfectly on tomcat 5.5. But when I deployed it on WebSphere 6, i was not able to call any action except static jsp files. I was getting HTTP 404 for all requests. I found solution on –
http://www.ibm.com/developerworks/forums/thread.jspa?threadID=158327
http://www-01.ibm.com/support/docview.wss?uid=swg24014758
http://stackoverflow.com/questions/1337786/struts2-doesnt-find-jsp-files