ISA Server Web Proxy service stops responding when the CacheConnectSize registry value is set to 0 (821935)


The information in this article applies to:

  • Microsoft Internet Security and Acceleration Server 2000 SP1

SYMPTOMS

When you Web publish servers through Internet Security and Acceleration (ISA) Server, the Microsoft Web Proxy service (W3proxy.exe) may stop responding, and you may either receive a stack dump of the error or a Dr. Watson error message, depending on the disaster recovery options set on the server. In either case, ISA Server no longer services Web Proxy-based traffic, and you must restart the Microsoft Web Proxy service.

CAUSE

This problem may occur if the following registry value is set to 0:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\W3Proxy\Parameters

The Web Proxy service uses the ConnectCacheSize registry value to determine how many sessions to maintain to the same remote server in support of clients that use the HTTP 1.1 "Proxy-Connection: Keep-Alive" and HTTP 1.1 "Keep-Alive" request headers.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites

You must have installed ISA Server 2000 Service Pack 1 (SP1) to install this hotfix. For additional information about how to obtain ISA Server 2000 Service Pack 1, click the following article number to view the article in the Microsoft Knowledge Base:

313139 How to Obtain the Latest Internet Security and Acceleration Server 2000 Service Pack

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. 
   Date         Time   Version       Size     File name
   -------------------------------------------------------
   29-May-2003  17:03  3.0.1200.272  178,448  Mspadmin.exe     
   29-May-2003  17:03  3.0.1200.272  103,184  Msphlpr.dll      
   29-May-2003  17:02  3.0.1200.272  391,952  W3proxy.exe      
   29-May-2003  17:03  3.0.1200.272  299,280  Wspsrv.exe

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

MORE INFORMATION

For additional information about the CacheConnectSize registry value, click the following article number to view the article in the Microsoft Knowledge Base:

822241 ISA Server Web Proxy service maintains connection when client sessions are closed



For additional information about how hotfix packages are named , click the following article number to view the article in the Microsoft Knowledge Base:

816915 New naming schema for Microsoft Windows hotfix packages

Modification Type:MinorLast Reviewed:10/28/2005
Keywords:kbHotfixServer kbQFE kbBug kbfix kbQFE kbWin2000preSP5fix KB821935 kbAudEndUser kbAudITPRO
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