hi geeta,
how do you have have the codes for the generated
servlets from the JSP....this will make my life easier
with debugging..
manish
--- Geeta Ramani <[EMAIL PROTECTED]> wrote:
> Hi John:
>
> Since you have a "java.lang.ClassCastException" as
> the reported exception, I would
> guess that it is the statement:
> layer = (LayerBean)i.next();
> that is causing the trouble. Some place in your
> servlet, you maybe are storing an
> object which is not a LayerBean in your vector
> (named "list" in the session
> variable)?? You may want to look at every place
> where you store something in this
> vector, and maybe you will find some one or more
> places where you are saving
> something which is not a LayerBean. (This may also
> explain why restarting the
> server seems to make the problem "go away".)
>
> If you want to be certain about where exactly the
> sever is running into trouble
> with your jsp, you may want to look at the generated
> servlet and go to the line
> number where the reported execption occurs. This
> will take the guess work out of
> your debugging..
>
> Cheers!
> Geeta
>
> John Cartwright wrote:
>
> > Hello All,
> >
> > I am hoping someone can solve this mystery for me
> since I'm stumped.
> >
> > I have a servlet which populates a vector with
> beans. It then puts
> > the
> > vector into the request object and forwards to a
> JSP page.
> >
> > The JSP page pulls the vector out of the request
> and proceeds to
> > call
> > methods on each bean in the list.
> >
> > Sometimes the whole thing quits working and
> complains with a
> >
> > Internal Servlet Error:
> > javax.servlet.ServletException: sde.LayerBean
> > ...
> > Root cause:
> > java.lang.ClassCastException: sde.LayerBean
> > ...
> >
> > Restarting tomcat solves the problem, but I'd like
> to understand
> > what's
> > going on. I'm assuming that it's the JSP page
> throwing the exception
> > (the errorPage directive engages).
> >
> > Can someone enlighten me? I'm using Tomcat 3.2.1
> (standalone) on
> > Linux
> > JDK1.3. The JSP page is listed below.
> >
> > Thanks!
> >
> > -- john
> >
> > <%@ page import="sde.LayerBean,java.util.*" %>
> > <html>
> > <body>
> > <%
> > Vector v =
> (Vector)request.getAttribute("list");
> > LayerBean layer;
> > Iterator i = v.iterator();
> > while (i.hasNext()) {
> > layer = (LayerBean)i.next();
> > %>
> > <%=layer.getTableName()%><BR>
> > <% } %>
> > </body>
> > </html>
> >
> > --
> >
>
===============================================================================
> > John Cartwright
> > Professional Research Assistant / Associate
> Scientist
> > CIRES, SEG/NGDC/NOAA
> > (303) 497-6284
> > [EMAIL PROTECTED]
> >
>
===============================================================================
> >
> >
>
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