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From "Denis Balazuc" <denis.bala...@trader.com>
Subject Re: Really weird Error...
Date Tue, 30 Oct 2001 15:55:58 GMT
Hi all
I have seen it myself a couple of times.

This definitely happens when you recompile some of the content of your
WEB-INF/classes and start a new session by opening a new browser window.
This is due to class reloading and I can see the error happening when the
new classloader for the context you're dealing with is starting his job.

This seldomly happen though, and not all the time.

Hope this helps.


----- Original Message -----
From: "David Treves" <dwork@macam.ac.il>
To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
Sent: Tuesday, October 30, 2001 10:39 AM
Subject: Re: Really weird Error...


> Hi Elm,
>
> sorry, but even though I am using sessions in my app that was not the
> reason, I tried to access the servlet from a different session, yet I got
> the same result.
>
> Thanks anyway!
> David.
>
> ----- Original Message -----
> From: "Elm Gysel" <elm.gysel@dateq.be>
> To: "Tomcat Users List" <tomcat-user@jakarta.apache.org>
> Sent: Tuesday, October 30, 2001 4:03 PM
> Subject: Re: Really weird Error...
>
>
> > I think I've seen this before.
> >
> > Are you working with sessions? Try after recompiling going to the page
> with
> > another browser. (not the one you used before the recompile)
> >
> > Could you tell me if this was the problem?
> >
> > Elm
> >
> >
> > > Hi,
> > >
> > > I am working with Tomcat 3.2.3 on win2000. Actually this is the pack
you
> > can
> > > download from JBoss. e.g. Tomcat integrated with JBoss.
> > >
> > > Now, when I compile and run a servlet everything runs great, but if I
> > decide
> > > to update the servlet and recompile it WITHOUT restarting the server,
> once
> > I
> > > invoke a request to that servlet I get the following error. Note that
> > > restarting the server fixes everything.
> > >
> > > Error: 500
> > > Location: /webTrails/admin
> > > Internal Servlet Error:
> > >
> > > java.lang.IllegalStateException: Can't happen - classname is null, who
> > added
> > > this ?
> > >  at
<SNIPPED EXCEPTION TRACE>


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