What's wrong with the JSP files?? Urgent Help Request

Question

I have run some JSP files using Apache Tomcat 4.0 but I see many similar error message for the JSP files when running on the IE. I don't whether I should install some other software or components or just program errors in the JSP files.
The error messages are as follows:
javax.servlet.ServletException: oracle/xml/parser/v2/XMLParseException
     at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:457)
     at org.apache.jsp.edit_0005fquiz_0005flist$jsp._jspService(edit_0005fquiz_0005flist$jsp.java:154)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:202)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:382)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:474)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:201)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2344)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:163)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1011)
     at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1106)
     at java.lang.Thread.run(Thread.java:536)
root cause
java.lang.NoClassDefFoundError: oracle/xml/parser/v2/XMLParseException
     at EntityBase.(EntityBase.java:18)
     at QuizGen.(QuizGen.java:16)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
     at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
     at java.lang.Class.newInstance0(Class.java:296)
     at java.lang.Class.newInstance(Class.java:249)
     at java.beans.Beans.instantiate(Beans.java:204)
     at java.beans.Beans.instantiate(Beans.java:48)
     at org.apache.jsp.edit_0005fquiz_0005flist$jsp._jspService(edit_0005fquiz_0005flist$jsp.java:122)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:202)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:382)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:474)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:201)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:246)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2344)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:163)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1011)
     at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1106)
     at java.lang.Thread.run(Thread.java:536)
And the reference JSP file is:
<%@page language="java" import="java.io.*, java.sql.*, DBSession, QuizGen"%>
<jsp:useBean id="sess" scope="session" class="DBSession"/>
<jsp:useBean id="quizGen" scope="session" class="QuizGen"/>
<%@include file="common.jsp"%>
<%
quizGen.setSession(sess);
quizGen.build();
quizGen.print(new PrintWriter(out), this.getURLPath(request, "edit_quiz_list.xsl"));
%>
another JSP file:
<%@page language="java" import="java.io.*, java.sql.*, eQuizMetadata"%>
<jsp:useBean id="eQuiz" scope="session" class="eQuizMetadata"/>
<%@include file="common.jsp"%>
<%
Integer nextQues = (Integer) session.getAttribute("eQuiz_nextQues");
session.setAttribute("eQuiz_nextQues", new Integer(nextQues.intValue()+1));
if (nextQues.intValue() > 0) {
if (request.getParameter("QueType").equals("F")) {
eQuiz.checkAnswer(request.getParameter("answer"));
else{
if (request.getParameter("QueType").equals("H")) {
eQuiz.checkAnswer(request.getParameter("map"));
else{
if(request.getParameter("QueType").equals("A")) {
String sAns = "";
     if (request.getParameter("MAT1") != null) sAns += request.getParameter("MAT1");
     if (request.getParameter("MAT2") != null) sAns += request.getParameter("MAT2");
     if (request.getParameter("MAT3") != null) sAns += request.getParameter("MAT3");
     if (request.getParameter("MAT4") != null) sAns += request.getParameter("MAT4");
     eQuiz.checkAnswer(sAns);
     else{
          if (request.getParameter("Cardinality").equals("S"))
          eQuiz.checkAnswer(request.getParameter("MC"));
          else {
          String sAns = "";
          if (request.getParameter("MR1") != null) sAns += request.getParameter("MR1");
          if (request.getParameter("MR2") != null) sAns += request.getParameter("MR2");
          if (request.getParameter("MR3") != null) sAns += request.getParameter("MR3");
          eQuiz.checkAnswer(sAns);
eQuiz.calAbility();
// meet one of the stopping criteria?
if (eQuiz.checkStopQuiz()) {
%>
<jsp:forward page="eQuiz_result.jsp"/>
<%
%>
<html>
<head>
<title>QuizML Management System</title>
</head>
<frameset border="0" rows="30,*">
<frame src="eQuiz_head.jsp" name="head" noresize scrolling="no">
<frame src="eQuiz_detail.jsp" name="detail" scrolling="auto">
</frameset>
</html>

Answer 1

root cause
java.lang.NoClassDefFoundError: oracle/xml/parser/v2/XMLParseExceptionYou simply don't have the "oracle.xml.parser.v2.XMLParseException" class in your classpath at run-time.