It was working fine. I added another servlet, made a entry to the web.xml, undeploy/redelploy of the app went ok with the Tomcat Manager. (The display name appears to be fine). All jsp part is working, Beans are created alright. The only thing is that all servlets stop working!!
I checked the web.xml, no corruption or whatsoever. No error message comes to the log, only
The requested resource (/workshop/wsupdater) is not available.
I even reversed the last string of actions -- taking out the changes made in jsp page, taking the entry out of web.xml, etc. Still it did not work.