Thanks Milt for ur reply. We solved it (but waiting
for any compalints) by attaching the time stamp to the
URL so that the ISP proxy does not cache it b'cos the
URL is diff for each request.


--- Milt Epstein <[EMAIL PROTECTED]> wrote:
> On Fri, 29 Nov 2002, Prichard-Levy Austin wrote:
>
> > Problems of this type can occur when an instance
> variable is
> > declared in error as static. What happens then,
> typically, is that
> > the last user (modifier) of such a variable sets
> it (via their
> > instance) for everyone rather than just for
> themselves, giving rise
> > to very strange and unpredictable behaviour. I
> came across an
> > example of this recently in a servlet I had to
> debug. I would
> > suggest you carefully re-examine the declarations
> and code of the
> > servlet concerned. Hope this helps. Austin
>
> That is, a concurrency issue.  I was thinking along
> those lines at
> first as well, but then I noticed he said the right
> output was shown
> when the page was reloaded/refreshed.  I think that
> makes caching the
> more likely problem here, as others have mentioned.
>
> One can check the list archives for how to disable
> caching for a page,
> there are some headers you can set to do it.
>
>
> > >  from:    raju punith <[EMAIL PROTECTED]>
> > >  date:    Thu, 28 Nov 2002 23:57:17
> > >  to:      [EMAIL PROTECTED]
> > >  subject: Re: hi
> > >
> > > Hi,
> > > we have a web application (student enquiry)
> using mvc
> > > architecture (jsp, servlet & java beans).
> > >
> > > the problem.
> > >
> > > student "A" accessed his details using his
> personal
> > > computer from home & got his personal details
> > > displayed properly but student "B" logged in
> from his
> > > home to access personal details  but got the
> details
> > > of student "A" but not of student "B" but when
> student
> > > "B" refreshed his screen or reload the page he
> got his
> > > details, both student's use the same ISP.
> (student "B"
> > > logged in after 3 hrs from student "A") student
> "A"
> > > never used student "B"'s pc before they are two
> > > different pc's.
> > >
> > >
> > > what may be causing this error ?
> > >
> > > system details.
> > > web server        : Apache 2.0
> > > servlet container : Tomcat 4.0.4
> > > Browser           : depends on student's pc.
> > >
> > > any help would be appreciated
> > >
> > > Regards
> > > Raju
>
> Milt Epstein
> Research Programmer
> Integration and Software Engineering (ISE)
> Campus Information Technologies and Educational
> Services (CITES)
> University of Illinois at Urbana-Champaign (UIUC)
> [EMAIL PROTECTED]
>
>
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