Hello Mr.Preston & Everybody Else,
Thanks for your explaination on how the buffer mechanism.
Well i had sent the code of my jsp file & bean to this list and as far as my
knowledge goes i'm not trying to call sendRedirect or any other method that
might throw the IllegalStateException and to testify to my above knowledge
i'm running the code on another page & it is running fantastically well.
I'd appreciate if the Big Guns of Jsp on this list could let me know their
thoughts on this strange behaviour.
Have a nice day.
With regards,
Sachin S. Khanna.
www.emailanorder.com
----- Original Message -----
From: Thomas Preston <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, June 28, 2000 8:49 PM
Subject: Re: Strange Bug
> Hi,
>
> Jsp uses buffer. When you start to send html back to client from server
> side, it doesn't just start sending it immediately. Instead it buffers
the
> output. WHen the buffer is full, the buffer has to be flushed back to the
> client. When this happens, the http head is sent along with the buffered
> body. At this point the buffer is said to be committed (see any servlet
> book on this issue or servlet spec). Once the buffer has been committed,
> the head has been sent back to the client, so any transaction that needs
to
> modify the head (like sendRedirect) will fail. In WL implementation of
jsp,
> if you keepgenerated and view the .java file that is generated by the
> server, you will see a try block around the re-direction operation that
> occurs when page wants to go to an error page. If re-direction is not
> possible because the head has been committed, you will get some type of
> error (like possibly illegalStateException) on the server console and the
> page will not be forwarded to the error page.
>
> >From: jonny doe <[EMAIL PROTECTED]>
> >Reply-To: A mailing list about Java Server Pages specification and
> > reference <[EMAIL PROTECTED]>
> >To: [EMAIL PROTECTED]
> >Subject: Re: Strange Bug
> >Date: Wed, 28 Jun 2000 07:41:30 -0700
> >
> >Hey Thomas,
> >
> >What do you mean by the buffer being 'committed'? I
> >came across this error to.
> >
> >--- Thomas Preston <[EMAIL PROTECTED]> wrote:
> > > Are you redirecting to an errorpage on error? If
> > > so, redirecting to error
> > > page can't be done if the buffer has been
> > > "committed". If this is the
> > > problem, then you are getting an exception on the
> > > page somewhere...
> > >
> > >
> > > >From: "Sachin S. Khanna" <[EMAIL PROTECTED]>
> > > >Reply-To: A mailing list about Java Server Pages
> > > specification and
> > > > reference <[EMAIL PROTECTED]>
> > > >To: [EMAIL PROTECTED]
> > > >Subject: Strange Bug
> > > >Date: Wed, 28 Jun 2000 16:01:15 +0530
> > > >
> > > >I have a simple jsp which uses a bean to send an
> > > email. The code is working
> > > >fine on one server but throwing the following error
> > > on the other:
> > > >java.lang.IllegalStateException: Response has
> > > already been committed
> > > >What could be the reason for this kind of strange
> > > behaviour.
> > > >Have a nice day.
> > > >With regards,
> > > >Sachin S. Khanna.
> > > >www.emailanorder.com
> > > >
> > >
> >
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> > > >JSP-INTEREST".
> > > >Some relevant FAQs on JSP/Servlets can be found at:
> > > >
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> > > >
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> > > >
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> >
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> Some relevant FAQs on JSP/Servlets can be found at:
>
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.html
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
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Some relevant FAQs on JSP/Servlets can be found at:
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http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
