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Proxy Error 502 Is Returned by ISA Server Under Heavy Stress


View products that this article applies to.

Symptoms

Under stress, the following error responses may be returned to the client occasionally:
502 Proxy Error (Software caused the connection to abort)
502 Proxy Error (Network logon failed)
This issue may occur under the following bridging and chaining configuration:
Client ------> ISA Server 1 -----> ISA Server 2 ----------> Server (IIS)
        HTTP                 SSL                 SSL/HTTP
					

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Resolution

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. The English version of this fix should have the following file attributes or later:
   Date         Time   Version      Size     File name  
   -----------------------------------------------------
   01-Jul-2001  14:26  3.0.1200.66  381,200  W3proxy.exe
				

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Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

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Keywords: KB294722, kbprb, kberrmsg, kbenv, kbhotfixserver, kbqfe, kbproductlink, kbautohotfix

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Article Info
Article ID : 294722
Revision : 8
Created on : 10/26/2007
Published on : 10/26/2007
Exists online : False
Views : 264