IIS keeps stopping?

  • Thread starter Thread starter chris-s
  • Start date Start date
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chris-s

Hi folks,

I wonder if anybody could give me a few pointers to a problem being reported
by one of our customers, whereby IIS stops running/hangs requiring them to
reboot the pc.

A bit more detail...
The problem occurs during the download of data to the PPC devices that are
connected on the local network via docks. The download of data is performed
using RDA/IIS/SSCE and prior to beginning the retreival of data the
application invokes a couple of very simple webservices to retreive
time/date and a few other simple strings.

There is no problem when three or fewer devices are downloading their data,
but when a fourth device attempts to invoke one of the web services whilst
the other three are doing their RDA bit, then IIS stops and all devices
loose their connections.

IIS is running on a Dell machine that is less than 12 months old, it's spec
is roughly 256Mb RAM, Pentium 4, 2Ghz running XP Pro with SP1a. The sql
server is running on a separate machine. So far as we are aware, the machine
is not being used for anything else resource wise.

The same setup is in use at other customer sites, but I am not sure whether
these other sites actually download the same number of devices at the same
time.

Unfortunately I do not have enough hardware here to try to replicate the
problem and the customer is a plane flight and six hours drive away. We are
going to provide the customer with a release that skips the webservice
checks to see if that behaves any differently.

Any help of ideas greatly appreciated!

Chris
 
Sounds like the web service is crashing IIS. Thats not
much RAM for a web server. If it were me I'd look at the
memory utilization while 3 devices are connected and then
watch what happens as 4th device connects. You could also
run a profiler on the web service to look for problems in
the code. Red Gate ANTS profiler has a full functional
free 14 day trial.
 
Chris, Joe might be right, but you should be able to use Repl/RDA with 4
devices with that configuration.

Does the problem reproduce if you do not call the webservice?

Kevin Boske
([email protected])
SQL Server CE Team
Microsoft
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Subject: IIS keeps stopping?
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Sounds like the web service is crashing IIS. Thats not
much RAM for a web server. If it were me I'd look at the
memory utilization while 3 devices are connected and then
watch what happens as 4th device connects. You could also
run a profiler on the web service to look for problems in
the code. Red Gate ANTS profiler has a full functional
free 14 day trial.
 
Thanks for the replies guys, we are going to try your suggestions and see
what happens, unfortuantely it can only be done on the customers site which
is far from ideal and will take some time to organise.

Cheers,

Chris

"Kevin Boske - [MS]" said:
Chris, Joe might be right, but you should be able to use Repl/RDA with 4
devices with that configuration.

Does the problem reproduce if you do not call the webservice?

Kevin Boske
([email protected])
SQL Server CE Team
Microsoft
-------------------------------------------------------------------------- --
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Everything you need to know about SQL Server CE:

http://www.microsoft.com/sql/ce/techinfo/default.asp
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This posting is provided "AS IS" with no warranties, and confers no rights.
Use of included script samples are subject to the terms specified at
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Content-Class: urn:content-classes:message
From: "Joe Audette" <[email protected]>
Sender: "Joe Audette" <[email protected]>
References: <[email protected]>
Subject: IIS keeps stopping?
Date: Fri, 5 Dec 2003 07:05:13 -0800
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X-Tomcat-NG: microsoft.public.dotnet.framework.compactframework

Sounds like the web service is crashing IIS. Thats not
much RAM for a web server. If it were me I'd look at the
memory utilization while 3 devices are connected and then
watch what happens as 4th device connects. You could also
run a profiler on the web service to look for problems in
the code. Red Gate ANTS profiler has a full functional
free 14 day trial.

-----Original Message-----
Hi folks,

I wonder if anybody could give me a few pointers to a problem being reported
by one of our customers, whereby IIS stops running/hangs requiring them to
reboot the pc.

A bit more detail...
The problem occurs during the download of data to the PPC devices that are
connected on the local network via docks. The download of data is performed
using RDA/IIS/SSCE and prior to beginning the retreival of data the
application invokes a couple of very simple webservices to retreive
time/date and a few other simple strings.

There is no problem when three or fewer devices are downloading their data,
but when a fourth device attempts to invoke one of the web services whilst
the other three are doing their RDA bit, then IIS stops and all devices
loose their connections.

IIS is running on a Dell machine that is less than 12 months old, it's spec
is roughly 256Mb RAM, Pentium 4, 2Ghz running XP Pro with SP1a. The sql
server is running on a separate machine. So far as we are aware, the machine
is not being used for anything else resource wise.

The same setup is in use at other customer sites, but I am not sure whether
these other sites actually download the same number of devices at the same
time.

Unfortunately I do not have enough hardware here to try to replicate the
problem and the customer is a plane flight and six hours drive away. We are
going to provide the customer with a release that skips the webservice
checks to see if that behaves any differently.

Any help of ideas greatly appreciated!

Chris


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