redirecting once jsp buffer has been flushed

I need to display an animated image to the client whilst some server side processing is carried out. In my code I flush the buffer, perform the server-side code and then want to redirect/forward to another jsp.

How can I do this as If I do a sendRedirect will get an illegalstateexception

Thanks In Advance
inzaghiAsked:
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inzaghiAuthor Commented:
come on experts!
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objectsCommented:
you cannot do a redirect after some response  has been sent
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Mayank SAssociate Director - Product EngineeringCommented:
You can only send the response to a request once. If you want asychronous processing in a web-app, use AJAX.
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inzaghiAuthor Commented:
To do the redirect I can use window.location. This is working fine.

But when I flush the browser the html is not being flushed to the client at the point it is done, instead it is done at the end of the processing. Any ideas?
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hoomanvCommented:
I've seen you are seriously trying to implement a progress indicator for your JSP page
you can get the idea used in this ASP tip
http://www.aspnetpro.com/NewsletterArticle/2003/08/asp200308bm_l/asp200308bm_l.asp
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Mayank SAssociate Director - Product EngineeringCommented:
>> To do the redirect I can use window.location.

That would run at the client-side, not the server-side.
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