NullPointerException in ServletHandler.getHolderEntry

Used code based on the embedded StaticContentServer. Source code attached. The server starts up okay with following INFO messages:

:INFO: Logging to STDERR via org.mortbay.log.StdErrLog :INFO: Java API for XML Processing Reference Implementation 1.2.6 :INFO: Started SelectChannelConnector @ 0.0.0.0:8181

When entering the URL, http://localhost:8181/index.html, into a browser, the following stack dump occurs:

:WARN: /index.html: java.lang.NullPointerException at org.mortbay.jetty.servlet.ServletHandler.getHolderEntry(ServletHandler.java:218) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:305) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:542) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:119) at org.mortbay.jetty.Server.handle(Server.java:245) at org.mortbay.jetty.HttpConnection.handlerRequest(HttpConnection.java:365) at org.mortbay.jetty.HttpConnection.access$1500(HttpConnection.java:38) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:609) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:486) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:196) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:296) at org.mortbay.jetty.nio.SelectChannelConnector$HttpEndPoint.run(SelectChannelConnector.java:740) at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:435) :WARN: /index.html java.lang.NullPointerException at org.mortbay.jetty.servlet.ServletHandler.getHolderEntry(ServletHandler.java:218) at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:305) at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:542) at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:119) at org.mortbay.jetty.Server.handle(Server.java:245) at org.mortbay.jetty.HttpConnection.handlerRequest(HttpConnection.java:365) at org.mortbay.jetty.HttpConnection.access$1500(HttpConnection.java:38) at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:609) at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:486) at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:196) at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:296) at org.mortbay.jetty.nio.SelectChannelConnector$HttpEndPoint.run(SelectChannelConnector.java:740) at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:435)