Re: OWA Web Listener 2.1 on NT hangs ...

We are experiencing the same problem only with an extremely busy site running six listeners on three servers. We have listeners exhibiting the exact symptoms you describe after an hour or so. Our site has to handle about 750,000 hits (including gifs) a day. We've found that if you run 2 web listeners on the same server they don't lock up at the same time. We have a HydraWeb load balancer sending requests to each of the lisenters based on the response time of a web-based database query. We are using monitoring software to restart any server when it detects both listeners locked up.

We did a bunch of load testing before trying to implement. We found a memory leak in the listener strongly correlated to get requests. We can manage this by restarting the listeners after a few hundred thousand gets. Unfortunately our load testing didn't reveal this other problem that you describe. This may be because our load tests had steady high load. In the real world the peaks are probably much higher.

Can this problem have something to do with the rate at which TCP connections are released?

Any ideas?

Ken

Matthias Suencksen wrote:

> Hello,
>
> we have the following Problem:
>
> html-generating procedures are called via ows2.1 and
> the web request broker.
>
> After 2 to 4 four days, the web listener just hangs,
> i.e. it accepts the socket connects from clients,
> but does not respond.
>
> CPU utilitization and memory Utilitization during hangs
> is normal, some WRBPROC processes are there.
>
> The listener will not stop through "net stop",
> we have to manually kill the WRB process and then
> re-start the listener to continue.
>
> products
> NT 4 /Service Pack 3
> Oracle 7.3.2.3.1
> Oracle_Web_Listener_NT_2.1.0.3.1/1.20in2
>
> Anyone with an idea ?
>
> Will it help to upgrade to 3.01? I read about spurious
> "Internal errors" on NT.
>
> bye
>
> Matthias Suencksen
> --
> ----------------------------------------------------------
> Matthias Suencksen <msuencks_at_marcant.de>
> PGP Key available on request
> ----------------------------------------------------------
Received on Wed Apr 01 1998 - 00:00:00 CST