java.lang.IllegalStateException: Can't happen - classname is null, who added this ?

[Szlapa, Michael]

Every now and then I get the following exception:

Location: /poc/
Internal Servlet Error:
java.lang.IllegalStateException: Can't happen - classname is null, who added
this ?
        at
org.apache.tomcat.core.ServletWrapper.loadServlet(ServletWrapper.java:261)
        at
org.apache.tomcat.core.ServletWrapper.init(ServletWrapper.java:289)
        at org.apache.tomcat.core.Handler.service(Handler.java:254)
        at
org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
        at
org.apache.tomcat.core.ContextManager.handleStatus(ContextManager.java:1049)
        at
org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:77
5)
        at
org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
        at
org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpC
onnectionHandler.java:210)
        at
org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
        at
org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
        at java.lang.Thread.run(Thread.java:484)


To be precise it happens when I navigate back to the first page of my
application.

I would very much appreciate any hints

Michael Szlapa
[EMAIL PROTECTED]