Despite setting the server.xml netry for the context and, having the correct directory structure, the servlet login wouldn't load and kept giving a 404 error.

I managed to get it right by setting the web.xml file this way :

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">

<web-app>
<servlet>
<servlet-name>
login
</servlet-name>
<servlet-class>
com.onjava.login
</servlet-class>
<load-on-startup>
1
</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>
login
</servlet-name>
<url-pattern>/servlet/*</url-pattern>
</servlet-mapping>
</web-app>

I don't know if this makes any sense, but the node <url-pattern> did it and it works now.