I think you should compile your application with debug information, that way you can see what line in your application causes it.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: den 7 november 2003 15:58 To: [EMAIL PROTECTED] Subject: error-page redirection Hello everyone, I am trying to display an error page if user enters a wrong number. The number has to be between 1 an d 10. I get following error: type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception LuckyException at LuckyNumber1Servlet.validate_number(Unknown Source) at LuckyNumber1Servlet.doGet(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java:743) at javax.servlet.http.HttpServlet.service(HttpServlet.java:856) Folks, I tried various ways to fix this issue. spent many hours searching thru books and internet, but could not find a way out. Can someone please point out the bug here? Thanks Raju Lokhande **************************************************************************** ***************************** Here is my servlet code: import java.io.*; import java.util.*; import java.sql.*; import javax.servlet.*; import javax.servlet.http.*; /** * This is a simple example of an HTTP Servlet. It responds to the GET * method of the HTTP protocol. */ public class LuckyNumber1Servlet extends HttpServlet { private int inp_int; public void init() throws ServletException { ServletContext servletContext = getServletContext(); servletContext.setAttribute("ServletTotal", new Integer(0)); } // end of init public void validate_number(String in_str) throws LuckyException { inp_int = Integer.parseInt( in_str ); if ( inp_int < 1 || inp_int > 10 ) throw new LuckyException(); } public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); response.setBufferSize(8192); PrintWriter out = response.getWriter(); // then write the data of the response out.println("<html>" + "<head><title>Hello</title></head>"); // then write the data of the response out.println("<body bgcolor=\"#ffffff\">" + "<img src=\"duke.waving.gif\">" + "<h2>My lucky number is 7. What's yours?</h2>" + "<form method=\"get\">" + "<input type=\"text\" name=\"lnumber\" size=\"25\">" + "<p></p>" + "<input type=\"submit\" value=\"Submit\">" + "<input type=\"reset\" value=\"Reset\">" + "</form>"); String lnumber = request.getParameter("lnumber"); Integer SessionTotal; int temp_int; if ( lnumber != null && lnumber.length() > 0 ) { try { validate_number( lnumber ); } catch ( LuckyException not_ignored) { response.resetBuffer(); throw new ServletException( not_ignored ) ; } HttpSession session = request.getSession( true ); synchronized(session) { SessionTotal = (Integer) session.getAttribute ( "SessionTotal"); if ( SessionTotal == null ) SessionTotal = new Integer(0); temp_int = SessionTotal.intValue() ; int temp_count = temp_int + Integer.parseInt( lnumber); Integer temp_integer = new Integer( temp_count); session.setAttribute ( "SessionTotal", temp_integer ); } ServletContext servletContext = getServletContext (); Integer ServletTotal = (Integer) servletContext.getAttribute ("ServletTotal"); if ( ServletTotal == null ) ServletTotal = new Integer( 0 ); int temp_int2 = ServletTotal.intValue() ; int temp_count2 = temp_int2 + Integer.parseInt( lnumber); Integer temp_integer2 = new Integer( temp_count2 ); servletContext.setAttribute("ServletTotal", temp_integer2); RequestDispatcher dispatcher = getServletContext().getRequestDispatcher ("/lucky2"); if (dispatcher != null) dispatcher.include(request, response); } out.println("</body></html>"); out.close(); } // end of doGet(). public String getServletInfo() { return "The LuckyNumber1Servlet servlet types a number."; } } // end of class LuckyNumber1Servlet *********************LuckyException.java ******************************* import javax.servlet.*; public class LuckyException extends ServletException { public LuckyException () { } /* public LuckyException (String msg) { super(msg); } */ } *********************web.xml file under /appication-context/web/WEB-INF ******************************* <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"; xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation ="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd";> <display-name>hello1</display-name> <servlet> <display-name>GreetingServlet</display-name> <servlet-name>GreetingServlet</servlet-name> <servlet-class>GreetingServlet</servlet-class> </servlet> <servlet> <display-name>ResponseServlet</display-name> <servlet-name>ResponseServlet</servlet-name> <servlet-class>ResponseServlet</servlet-class> </servlet> <servlet> <display-name>LuckyNumber1Servlet</display-name> <servlet-name>LuckyNumber1Servlet</servlet-name> <servlet-class>LuckyNumber1Servlet</servlet-class> </servlet> <servlet> <display-name>LuckyNumber2Servlet</display-name> <servlet-name>LuckyNumber2Servlet</servlet-name> <servlet-class>LuckyNumber2Servlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>GreetingServlet</servlet-name> <url-pattern>/greeting</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>ResponseServlet</servlet-name> <url-pattern>/response</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>LuckyNumber1Servlet</servlet-name> <url-pattern>/luckynumber</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>LuckyNumber2Servlet</servlet-name> <url-pattern>/lucky2</url-pattern> </servlet-mapping> <error-page> <exception-type>LuckyException</exception-type> <location>/errorpage.html</location> </error-page> </web-app> *********************errorpage.html file under /appication-context/web/ ******************************* <html> <head> <title>Data Entry Error</title> </head> <body bgcolor="white"> <h2>Please enter a number between 1 and 10. </h2> </body> </html>
