Webapp client spits out bursts of identical requests

We have the following setup: IIS 5.1 on Win2K server with ASP.NET
enabled running several web applications. About 4 to 50 Web clients
running MSIE6.0 connect to these webapps on company intranet, Windows
authenticated. Session timeout is set at 900 minutes. The load on the
IIS is definitely light: only about a hit a minute or less. We
experience the following scenario:

A client sends out a POST request, and gets a timeout (we suppose).
Without the operator at the client touching anything on his IE screen,
the client has POSTed not one but six or even up to three hundred
requests with exactly the same information. The ASP.NET app has duly
handled these requests, and we have to remove the spurious data via
SQL-scripting. This happens seldomly, but unexpected.

The IIS logs this all by registering an anonymous POST with status
code 500 (sc-win32-status is 10054 (client disconnected itself)).
After that the series of POST requests mentioned above shows up.
_These_ requests are not anonymous but Windows authenticated as they
should be.

Anybody has an idea what is going on here? What am I to do to fix
this?

Thanks,
Michiel.
groeten,

Michiel.
mailto:mjl.rademakers@planet.nl

David
Sun Mar 12 18:55:06 CST 2006

Can you isolate using network sniffer whether those extra requests are
coming from IE, IIS, or some third party network device?

Put a sniffer on the client and another on the IIS server and see what shows
up.
- If both sniffs show extra requests, then it comes from IE.
- If the client side sniff shows one request but server side shows many,
then it comes from some third party network device between the client and
server
- If both sniffs show one request, then it comes from within IIS/ASP.Net

--
//David
IIS
http://blogs.msdn.com/David.Wang
This posting is provided "AS IS" with no warranties, and confers no rights.
//

<MichielR> wrote in message
news:0mk6125lsgc6eso8kqbo1g7oouqu4cm26n@4ax.com...
> We have the following setup: IIS 5.1 on Win2K server with ASP.NET
> enabled running several web applications. About 4 to 50 Web clients
> running MSIE6.0 connect to these webapps on company intranet, Windows
> authenticated. Session timeout is set at 900 minutes. The load on the
> IIS is definitely light: only about a hit a minute or less. We
> experience the following scenario:
>
> A client sends out a POST request, and gets a timeout (we suppose).
> Without the operator at the client touching anything on his IE screen,
> the client has POSTed not one but six or even up to three hundred
> requests with exactly the same information. The ASP.NET app has duly
> handled these requests, and we have to remove the spurious data via
> SQL-scripting. This happens seldomly, but unexpected.
>
> The IIS logs this all by registering an anonymous POST with status
> code 500 (sc-win32-status is 10054 (client disconnected itself)).
> After that the series of POST requests mentioned above shows up.
> _These_ requests are not anonymous but Windows authenticated as they
> should be.
>
> Anybody has an idea what is going on here? What am I to do to fix
> this?
>
> Thanks,
> Michiel.
> groeten,
>
> Michiel.
> mailto:mjl.rademakers@planet.nl