Tomcat Parse Error
SEVERE: Parse Error at line xx column xx: The content of element type "web-app" must match"
This is because the web.xml file does not match the schema specified at the top of the web.xml file. Note that in Tomcat 4.1 and older versions, the elements in the web.xml deployment descriptor must be in a specific order, determined by the DTD. If the elements are in the wrong order, then you will get error message.
Lookup the DTD and check if your web.xml is correct.