System.Net.WebException making web service calls about 10% of the time.

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Chris Langston - 09 Aug 2004 19:34 GMT

We are seeing a very frustrating intermittent problem. We are making
Synchronious web service method calls from a .NET windows Service using the
following syntax

WebRequest.getResponse call it occasionally fails with the following error:

1) Exception Information
*********************************************
Exception Type: System.Net.WebException
Status: ConnectFailure
Response: NULL
Message: The underlying connection was closed: Unable to connect to the
remote server.
TargetSite: HorizonBoss.SoftwareUpdate.BusinessObjects.SoftwareInfoResponse
GetSoftwareUpdateInfo(HorizonBoss.SoftwareUpdate.BusinessObjects.SoftwareInf
oRequest)
HelpLink: NULL
Source: HorizonBoss.SoftwareUpdate.WSProxy

StackTrace Information
*********************************************
at
HorizonBoss.SoftwareUpdate.WSProxy.SoftwareUpdateProxy.GetSoftwareUpdateInfo
(SoftwareInfoRequest requestInfo)
at
HorizonBoss.SoftwareUpdate.Components.ApplicationUpdateChecker.ApplicationUp
dateChecker.AppUpdater_OnCheckForUpdate(Object sender, EventArgs e)
This error occurs approximately 10% of the time. We are not using a proxy
server.

Any assistance would be great. We are using WSE 1.0 SP1 to encrypt and
decrypt messages.

The Remote Web Servers are running IIS 5.0 and IIS 6.0. The OS on the
remote servers are Windows 2K or Windows 2003 Server. The Web Servers that
we are calling into are taking a lot of request from many clients asking for
information.

There is no authentications on the remote web server as all requests are
coming through as anonymous.

Thanks

Chris Langston

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Lucien - 09 Aug 2004 22:03 GMT

This doesn't look like a WSE specific issue and therefore I would post this
also in ASPNET/ASMX discussion groups (or contact tech support).

It's difficult to tell what's causing this but you may want to check the
server timeout setting and try to increase it and see if that changes
anything. Also check you're not running out of connections.

> We are seeing a very frustrating intermittent problem. We are making
> Synchronious web service method calls from a .NET windows Service using the
[quoted text clipped - 10 lines]
> remote server.
> TargetSite: HorizonBoss.SoftwareUpdate.BusinessObjects.SoftwareInfoResponse

GetSoftwareUpdateInfo(HorizonBoss.SoftwareUpdate.BusinessObjects.SoftwareInf

> oRequest)
> HelpLink: NULL
[quoted text clipped - 3 lines]
> *********************************************
> at

HorizonBoss.SoftwareUpdate.WSProxy.SoftwareUpdateProxy.GetSoftwareUpdateInfo

> (SoftwareInfoRequest requestInfo)
> at

HorizonBoss.SoftwareUpdate.Components.ApplicationUpdateChecker.ApplicationUp

> dateChecker.AppUpdater_OnCheckForUpdate(Object sender, EventArgs e)
> This error occurs approximately 10% of the time. We are not using a proxy
[quoted text clipped - 14 lines]
>
> Chris Langston

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System.Net.WebException making web service calls about 10% of the time.

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