Pramod,
Tons of thanks for the reply. Your answers made me sure that i have to look for
the problem in other areas. I still welcome any other ideas on this problem.
By the way, i used <[EMAIL PROTECTED]> on my jsp pages.
Thanks once again.
--- Pramod Nair <[EMAIL PROTECTED]> wrote:
> > 1- Is each user has it's own instance of jsp page?
>
> For all practical purposes, you can consider that each user has an
> "instance" of the JSP page
>
> > 2- Do I need to synchronized request.sendRedirect() in jsp page?
>
> That shouldn't be necessary
>
> > Also :
> > Is this error happen because I used a jsp page "LoginServlet.jsp" for
> > database invocation and event handling instead of a pure servlet?
>
> Ideally, your LoginServlet.jsp should have been a pure servlet, but
> then, thats simply a design aesthetics point of view. It certainly shouldn't
> cause an error.
>
> btw, Are you by any chance using the <%! %> tag or the <@page> directive in
> your JSP code ?
>
> regards
>
> Pramod Nair
>
> ----- Original Message -----
> From: "Ali Chadorbaf" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Monday, September 16, 2002 12:17 AM
> Subject: unable to dispatch to requested page........request.sendRedirect()
> ?
>
>
> > Hi friends,
> > I have a problem in my jsp application and would like to bring it to your
> > attention, so you may see something that I didn't.
> >
> > Some info:
> > I developed a jsp application using JDeveloper9i as IDE and deployed it on
> > Oracle 9i Application server. This application is totally based on jsp
> pages
> > and no pure servlet is involved. But used java embedded code in jsp pages.
> To
> > worked as a servlet.
> > This application works fine in single user environment but I saw a lot of
> > errors like following when multi users invoke it. This errors some times
> lock
> > the entire application and application server no longer respond to
> requests and
> > has to be restart.
> >
> > Here is a type of error I saw in application server log file:
> >
> > 9/12/02 9:30 AM defaultWebApp: Internal error in sendError()
> > java.lang.IllegalArgumentException: Attempted to write longer than
> > Content-Length (0 + 1648 / 249)
> > at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for
> >
> J2EE].server.http.EvermindServletOutputStream.write(EvermindServletOutputStr
> eam.java:231)
> >
> > at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for
> >
> J2EE].server.http.EvermindServletOutputStream.write(EvermindServletOutputStr
> eam.java:130)
> >
> > at com.evermind[Oracle9iAS (9.0.3.0.0) Containers for
> >
> J2EE].server.http.EvermindHttpServletResponse.sendError(EvermindHttpServletR
> esponse.java:1301)
> >
> > at
> oracle.jsp.runtimev2.JspReportUtil.reportException(JspReportUtil.java:135)
> > .....
> > ...
> > 9/12/02 9:30 AM defaultWebApp: JspServlet: unable to dispatch to requested
> > page: com.evermind.server.http.HttpIOException: Connection reset by peer:
> > socket write error
> > at
> >
> com.evermind.server.http.EvermindHttpServletResponse.commit(EvermindHttpServ
> letResponse.java:673)
> >
> > at
> >
> com.evermind.server.http.EvermindHttpServletResponse.commitAndIgnoreWrites(E
> vermindHttpServletResponse.java:212)
> >
> > at
> >
> com.evermind.server.http.EvermindHttpServletResponse.sendRedirect(EvermindHt
> tpServletResponse.java:1347)
> >
> > at _AdminProject._site1._LoginServlet._jspService(_LoginServlet.java:95)
> > at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
> > at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:180)
> > ...
> > ...
> >
> > Here i bring a simple example which handles a login page in this
> application.
> > That's include two jsp pages named "LoginScreen.jsp" and
> "LoginServlet.jsp".
> > "LoginServlet.jsp" processes the employee_id received from
> "LoginScreen.jsp"
> > and retrieves the profile from database and send the values to the screen
> on
> > "LoginScreen.jsp" .Also it sends and error if the employee_id is invalid.
> >
> >
> > LoginServlet.jsp
> > .
> > ..
> > <%
> > HttpSession mySession = request.getSession(false);
> >
> > // get employee_id from screen
> > String sEmpNo=request.getAttribute("emp");
> > String errMsg="';
> > ...
> > ..
> > // some database invocation are involve here
> > // to validate employee_id and get his/her profile
> > // if employee not found then errMsg="Employee not found"
> > ...
> > ...
> > // put values on the session to send them on screen
> > mySession.setAttribute("emp",sEmp);
> > mySession.setAttribute("firstname",sFirstName);
> > mySession.setAttribute("lastname",sLastName);
> >
> > //redirect to screen
> > request.sendRedirect("LoginScreen.jsp?err="+errMsg);
> > %>
> >
> >
> >
> > loginScreen.jsp
> > .
> > <!script>
> > function showError(err){
> > if (err.length>0) alert(err);
> > }
> > <!/script>
> >
> > .
> > ..
> > <%
> > HttpSession mySession = request.getSession(false);
> > //Get values from the HttpSession and HttpRequest
> > String sEmp=mySession.getAttribute("emp");
> > String sFirstname=mySession.getAttribute("firstname");
> > String sLastname=mySession.getAttribute("lastname");
> > String errMsg=request..getAttribute("err");
> > ...
> > ..
> > %>
> > <html>
> > <form name=frm>
> > <body onload="showError(<%=errMsg%>)"
> > ..
> > You are successfully logged in:
> > <input name="emp" value="<%=sEmp%>" />
> > <input name="first" value="<%=sFirstname%>" />
> > <input name="last" value="<%=sLastname%>" />
> > ...
> > ...
> > </form>
> > </body>
> > </html>
> >
> >
> >
> > Seems request.sendRedirect() cannot respond to multi users and this method
> will
> > fail if multi users at the same time invoke it. This problem brought me
> some
> > beginner questions:
> >
> > 1- Is each user has it's own instance of jsp page?
> > 2- Do I need to synchronized request.sendRedirect() in jsp page?
> > Also :
> > Is this error happen because I used a jsp page "LoginServlet.jsp" for
> > database invocation and event handling instead of a pure servlet?
> >
> > I totally lost on this and would appreciate to share me any idea that you
> might
> > have.
> >
> > Thanks a lot in advance.
> > Ali
> >
> >
> > __________________________________________________
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> >
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