web-override.xml

<?xml version="1.0" encoding="UTF-8"?>

  <!-- ===================================================================== -->
  <!-- This file contains the default descriptor for web applications.       -->
  <!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
  <!-- The intent of this descriptor is to include jetty specific or common  -->
  <!-- configuration for all webapps.   If a context has a webdefault.xml    -->
  <!-- descriptor, it is applied before the contexts own web.xml file        -->
  <!--                                                                       -->
  <!-- A context may be assigned a default descriptor by:                    -->
  <!--  + Calling WebApplicationContext.setDefaultsDescriptor                -->
  <!--  + Passed an arg to addWebApplications                                -->
  <!--                                                                       -->
  <!-- This file is used both as the resource within the jetty.jar (which is -->
  <!-- used as the default if no explicit defaults descriptor is set) and it -->
  <!-- is copied to the etc directory of the Jetty distro and explicitly     -->
  <!-- by the jetty.xml file.                                                -->
  <!--                                                                       -->
  <!-- ===================================================================== -->
<web-app
  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_3_0.xsd"
  metadata-complete="true"
  version="3.0">

    <servlet>
        <servlet-name>default</servlet-name>
        <servlet-class>org.eclipse.jetty.servlet.DefaultServlet</servlet-class>
        <init-param>
            <param-name>useFileMappedBuffer</param-name>
            <param-value>false</param-value>
        </init-param>
        <init-param>
            <param-name>dirAllowed</param-name>
            <param-value>false</param-value>
        </init-param>
        <init-param>
            <param-name>welcomeServlets</param-name>
            <param-value>true</param-value>
        </init-param>
    </servlet>

</web-app>