Internal Servlet Error

[yash bhat]

I am facing a problem with Application installed in Tomcat ,Apache .After a certain period of time
the application shows Internal Servlet Error,after i restart tomcat and apache it works fine.
The error that we gets in browser is
Error: 500
Location: /AccountAggregator/servlet/pm/accagg
Internal Servlet Error:
java.lang.NoClassDefFoundError: com/tarangtech/pcf/exception/ErrCdMsg
at com.tarangtech.pcf.exception.TarangException.(TarangException.java:38)
at com.tarangtech.pcf.navigator.Navigator.loadNavMap(Navigator.java:205)
at com.tarangtech.pcf.navigator.Navigator.(Navigator.java:53)
at com.tarangtech.pcf.PresentationController.doPost(PresentationController.java:245)
at com.tarangtech.pcf.PresentationController.doGet(PresentationController.java:97)
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:405)
at org.apache.tomcat.core.Handler.service(Handler.java:287)
at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:812)
at org.apache.tomcat.core.ContextManager.service(ContextManager.java:758)
at org.apache.tomcat.service.connector.Ajp13ConnectionHandler.processConnection(Ajp13ConnectionHandler.java:160)
at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
at java.lang.Thread.run(Thread.java:484)

[Cindy Glass]

yashb,
Please change your name to be compliant with JavaRanch's naming policy.
Your displayed name should be 2 separate names with more than 1 letter each. We really would prefer that you use your REAL name.
You can change your name: here.
Thanks,
Cindy