title: Upgrading web.xml to 2.4 or above in NetBeans
body: <p>I am using NetBeans IDE 7.2.1 version with APACHE tomcat 7.0.27.0 version server. I am trying to make a servlet file in my project but its showing the following message or error-</p>
  
  <p>"Web application version is unsupported . Upgrade web.xml to version 2.4 or newer or use previous version of NetBeans." </p>
  
  <p>How can i fix it please reply-</p>