Mine

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <servlet>
        <servlet-name>WicketApplication</servlet-name>
        <servlet-class>org.apache.wicket.protocol.http.WicketServlet</servlet-class>
        <init-param>
            <param-name>applicationClassName</param-name>
            <param-value>com.myapp.wicket.WicketApplication</param-value>
        </init-param>
        <init-param>
            <param-name>debug</param-name>
            <param-value>2</param-value>
        </init-param>
        <init-param>
            <param-name>detail</param-name>
            <param-value>2</param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
        </servlet>
    <servlet-mapping>
        <servlet-name>WicketApplication</servlet-name>
        <url-pattern>/wicket/*</url-pattern>
    </servlet-mapping>
    <session-config><session-timeout>
            30
        </session-timeout></session-config>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
        </welcome-file-list>
    </web-app>