tomcat configuration

According to the Servlet 2.4 specification, every Web application should include a deployment descriptor (web.xml file). This file must be placed in the WEB-INF/ directory of the Web application. There is also a web.xml file under the $CATALINA_HOME/conf directory. This file is similar to a Web application’s web.xml file. However, this particular web.xml file is used to specify the default properties for all Web applications that are running within this server instance. Be very careful when making modifications to this file (such as any additions or changes) because they will affect all Web applications running on the same server instance. Note also that other application servers may or may not support a global default web.xml, as this is not a requirement for Servlet 2.4 standard compliance. Web.xml can be formally validated against a schema: <web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:s...