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Mohit,

On 2/11/2010 1:41 AM, Mohit Anchlia wrote:
> On Wed, Feb 10, 2010 at 2:44 PM, Christopher Schultz
> <ch...@christopherschultz.net> wrote:
> Mohit,
> 
> On 2/10/2010 5:28 PM, Mohit Anchlia wrote:
>>>> There is a proxy F5 in between. But this server sends 100s of request
>>>> per sec. to the same URL. Essentially it's the same code. Only few of
>>>> them fail. This application is non browser based application.
> 
> I think you'll need to instrument either these clients or your webapp to
> write more detailed logs in order to diagnose this.
> 
>> Is there a way I can try and reproduce. What bothers me is that I
>> don't see it in our logs. I was wondering if I can write a small code
>> to validate that. Do I just need to add HTTP 6.0 in the header or
>> something like that? Or can I do it from the browser?

You'll probably have to do this with your own custom client... I don't
know of any browsers that let you play with the HTTP stream enough to
change the protocol.

Fortunately, the HTTP protocol is pretty easy to fake: you can even use
telnet:

$ telnet localhost 80
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
GET / HTTP1.1

HTTP/1.1 200 OK
Date: Thu, 11 Feb 2010 14:39:40 GMT
Server: Apache/2.2.9 (Debian) mod_jk/1.2.28 mod_ssl/2.2.9 OpenSSL/0.9.8g
Last-Modified: Sat, 18 Jul 2009 01:21:07 GMT
ETag: "6ab4010-2d-46ef0b81da6c0"
Accept-Ranges: bytes
Content-Length: 45
Vary: Accept-Encoding
Connection: close
Content-Type: text/html

<html><body><h1>It works!</h1></body></html>
Connection closed by foreign host.

I tried using "HTTP6.0" and Apache httpd gladly responded in the same
way. Tomcat does the same, apparently, which I hadn't expected.

I wonder if your BigIP has been configured to advertise "Coyote" as the
server. You might want to check the logs on the BigIP.

- -chris
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