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From "Johnny Kewl" <>
Subject Re: question : encounter Read timed out occasionally
Date Mon, 13 Oct 2008 08:34:10 GMT

----- Original Message ----- 
From: "James Wang" <>
To: "Tomcat Users List" <>
Sent: Monday, October 13, 2008 7:11 AM
Subject: Re: question : encounter Read 
timed out occasionally

> Hi Mark,
> In order to find out if the problem of Request.getParameter("parm") return
> null (missing post
> body part) is related to http keep-alive,  We've tried to reduce
> the KeepaliveTimeout setting in
> Apache httpd server from 15 seconds to 5 seconds,  the strange thing
> happened, We found
> the null parameter count was raised from 400/per-day (in average) to 900
> times/per-day.
> The next step we are going to disable the keep-alive and see what will
> happen, will let you
> know the result for reference.
> If disabling keeplive could resolve this problem, the mysterious part then
> is why the
> the browser get stuck on uploading the post body part always.

James, what is actually doing the post?... Ajax?
Look I dont know, but it smells like a data size problem...
Something like a header size is saying... you going to get 500 bytes and 
only 499 come in... so now the browser is waiting for the stupid server to 
reply, and the server thinks the stupid browser is just slow... eventually 
TCP sockets say... good bye, you guys are just too slow.
So socket time out, I think, is not the real issue... some header size is 
wrong... maybe something subtle like its multibyte and the header size is 
calculating bytes.
If you click twice and then the 1st param comes in... it sounds very much 
like a header size calc is out...
I dont know... but thats what I'd be looking for...

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