web-fragment.xml

<web-fragment xmlns="http://xmlns.jcp.org/xml/ns/javaee"
              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
              version="3.1">
  <context-param>
    <param-name>preference</param-name>
    <param-value>second</param-value>
  </context-param>
  <session-config>
    <session-timeout>
      30
    </session-timeout>
  </session-config>
</web-fragment>