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From Ben Laurie <...@gonzo.ben.algroup.co.uk>
Subject Re: WWW Form Bug Report: "Server Side Push blocking bug" on Linux (fwd)
Date Thu, 17 Oct 1996 21:55:27 GMT
> ghn@qtmsys.com said:
> > From nobody@hyperreal.com  Thu Oct 17 17:36:37 1996
> > Message-Id: <199610172138.OAA11657@taz.hyperreal.com>
> > From: ghn@qtmsys.com
> > To: awm@qosina.com
> > Date: Thu Oct 17 14:38:06 1996
> > Subject: WWW Form Bug Report: "Server Side Push blocking bug" on Linux
> > 
> > Submitter: ghn@qtmsys.com
> > Operating system: Linux, version: 
> > Version of Apache Used: 1.1.1
> > Extra Modules used: Cache
> > URL exhibiting problem: 
> > 
> > Symptoms:
> > --
> > It looks to me like Apache still has a bug that
> > has been a known bug in NCSA for a long time,
> > wherein if a server-side-push document stops
> > sending data at any point, the pipeline switches
> > into a blocked transfer mode with 8k blocks.
> > 
> > The net result is that if an application sends
> > a stream of small images with pauses between them,
> > the client sees a long pause followed by a burst
> > of images.
> > 
> > I was hoping you could tell me if this was a known
> > Apache bug, or perhaps one that has been fixed
> > since 1.1.1, since I did not see it mentioned on
> > your list of known bugs.
> > 
> > If it is a known but as-yet-unfixed bug, please
> > let me know, because I would be happy to work on
> > tracking it down.

This is not exactly a bug, though it is well known. The tacky solution is to
use NPH. The cool solution is to use a header returned from the CGI to turn off
buffering. I keep meaning to implement this. Perhaps I'll get round to it one
day. Someone'll have to do it for Apache 2.0, for sure.

Cheers,

Ben.

> > 
> > Thanks,
> > Greg Nelson
> > ghn@qtmsys.com
> > --
> > 
> > Backtrace:
> > --
> > 
> > --
> > 
> 
> 
> -- 
> 
>   What is comedy?  Comedy is the art of making people laugh without making
>   them puke.
>                 -- Steve Martin
> 
> Aram Mirzadeh				     Apache httpd team member		
> awm@qosina.com				     awm@apache.org
> http://www.qosina.com/~awm/		     http://www.apache.org
> 	    PGP Key http://www.qosina.com/~awm/pgpkey.html
>            BE 49 9D F6 2A A7 22 FC  02 E9 1E 3D F7 0C 67 A0

-- 
Ben Laurie                  Phone: +44 (181) 994 6435
Freelance Consultant and    Fax:   +44 (181) 994 6472
Technical Director          Email: ben@algroup.co.uk
A.L. Digital Ltd,           URL: http://www.algroup.co.uk
London, England.            Apache Group member (http://www.apache.org)

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