Setting the Session Timeout in Tomcat

You can specify the timeout of a session in the deployment descriptor of your web application (web.xml):

<web-app>
  <session-config>
    <session-timeout>60</session-timeout>
  </session-config>

  ...
</web-app>

The number within the session-timout element must be expressed in minutes.

Be sure to restart Tomcat to take the new setting.