Error 500 - Problem bei Tomcat (auf Linux)

[Bruno Walter]

Hallo!

Ich wollte mit Tomcat das LoginServlet starten. Hierbei habe ich folgende Fehlermeldung erhalten:

Error: 500
Location: /LMS/LoginServlet
Internal Servlet Error:

java.lang.NullPointerException
at java.lang.ClassLoader.resolveClass0(Native Method)
at java.lang.ClassLoader.resolveClass(ClassLoader.jav a:588)
at org.apache.tomcat.loader.AdaptiveClassLoader.loadC lass(AdaptiveClassLoader.java:430)
at org.apache.tomcat.loader.AdaptiveServletLoader.loa dClass(AdaptiveServletLoader.java:174)
at org.apache.tomcat.core.ServletWrapper.loadServlet( ServletWrapper.java:265)
at org.apache.tomcat.core.ServletWrapper.init(Servlet Wrapper.java:289)
at org.apache.tomcat.core.Handler.service(Handler.jav a:254)
at org.apache.tomcat.core.ServletWrapper.service(Serv letWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalServ ice(ContextManager.java:812)
at org.apache.tomcat.core.ContextManager.service(Cont extManager.java:758)
at org.apache.tomcat.service.http.HttpConnectionHandl er.processConnection(HttpConnectionHandler.java:21 3)
at org.apache.tomcat.service.TcpWorkerThread.runIt(Po olTcpEndpoint.java:416)
at org.apache.tomcat.util.ThreadPool$ControlRunnable. run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:484)

Vielleicht kann mir jemand weiterhelfen.