I'm trying to run Hudson on resin-3.1.2 available at http://caucho.com/ and am
getting the following exception when loading http://localhost:8080/hudson :

java.net.MalformedURLException:
at
com.caucho.server.webapp.ServletContextImpl.getResource(ServletContextImpl.java:276)
at org.kohsuke.stapler.Stapler.service(Stapler.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:91)
at
com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103)
at hudson.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:79)
at
com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:73)
at
com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:175)
at
com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:240)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:263)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:481)
at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:685)
at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:607)
at java.lang.Thread.run(Thread.java:619)

I've browsed through the source available at http://fisheye5.cenqua.com/browse/
hudson/hudson/ but can't seem to find the org.kohsuke.stapler.Stapler class to
try to figure out what it's doing.