Hi Help me in executing My Project

Question

Hi all,
I'm a BTECH student. I'm currently doing my project and had some problem during execution...
My SYStem Configuration:
OS: Windows 2000 server..
For Project Purpose I Installed in my System:
JDK 1.5
Tomcat 5.0 and
Oracle 9i..
I can't run the project.I would like know from u all whether I can run my Project (JAVA PROJECT) on a single system with all jdk, tomacat , and Oracle 9i installed on a single system.....
Here are the problems I faced during my project execution:
1: I'm receving severe errors in the tomcat open console saying that the port 8080 is already in use...Then I changed the port no 8081.. After I chnged my port everthing is ok... But while executing the project i recieved the following error...
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:358)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
root cause
java.lang.NullPointerException
     org.apache.jsp.Validate_jsp._jspService(Validate_jsp.java:149)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:133)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:311)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:301)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:248)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
note The full stack trace of the root cause is available in the Tomcat logs
2.. Here is my JSP which allows databse connectivity
<%@ page import="java.sql.*" %>
<%!
                    Connection Con=null;
                    Statement St=null ;
%>
<%
String driver="oracle.jdbc.driver.OracleDriver";
String url="jdbc:oracle:thin:@nit15:1521:project";
String user="trading";
String pwd="trading";
try
Class.forName(driver);
Con=DriverManager.getConnection(url,user,pwd);
     St=Con.createStatement();
          System.out.println("Connection is established");
catch(Exception e)
          System.out.println(e);
          out.println("Connection is not Established ... ");
%>
I think i had problem with the following line...
String url="jdbc:oracle:thin:@nit15:1521:project";
since i'm running the whole project on a single system
I replaced nit15 with localhost---- is this right... I thhink i shuld write here my system name how can find my system name or machine name
I left 1521 as it is...
then finally i replaced project with ora which is DSN name i created...
Can any one help me out from this...Please give me ur mail id's so that i can have a chat with with u friends... plzzz help me.. plzz share ur knowledge with me.. plzzz.. my id is [email protected]..

Answer 1

Well for one thing you seem to have multiple Tomcat instances running. This may or may not be contributing to your problems and confusion.
Also I don't see where your code could be throwing a null pointer exception.
To be honest I think you should first investigate how many Tomcat instances you have running and clean that up first. Because you could well be deploying to the wrong instance for all we know.