tomcat

[Noone Anil Kumar <an...@india.hp.com>]

Hi ,

I am running  my servlet:" MarsDm" on the following set up:

Apache 1.3.12
Tomcat 3.2.1
WinNt 4.0

and i encountered the following exception,  when the servlet was loaded
and started running properly:

Error: 500
Location: /servlet/MarsDm
Internal Servlet Error:

java.lang.NullPointerException
 at org.apache.tomcat.facade.HttpSessionFacade.getValue(Compiled Code)
 at org.apache.tomcat.facade.HttpSessionFacade.getValue(Compiled Code)
 at SessionTrack.setAccessMode(Compiled Code)
 at MarsDm.doGet(Compiled Code)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
 at
org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)

 at org.apache.tomcat.core.Handler.service(Handler.java:286)
 at
org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
 at
org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)

 at
org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
 at

org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler

.java:210)
 at org.apache.tomcat.service.TcpWorkerThread.runIt(Compiled Code)
 at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(Compiled Code)

 at java.lang.Thread.run(Compiled Code)


I would appreciate if anybody help me out on this...

Thanks,
Anil