HTTP POSTS Through ISA Server Do Not Use Cached Connections (305835)
The information in this article applies to:
- Microsoft Internet Security and Acceleration Server 2000
This article was previously published under Q305835 IMPORTANT: This article contains information about modifying the registry. Before you
modify the registry, make sure to back it up and make sure that you understand how to restore
the registry if a problem occurs. For information about how to back up, restore, and edit the
registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
SYMPTOMS
Every POST request that comes through Internet Security and
Acceleration (ISA) Server-based computer may create a new session to a Web server that is published behind ISA Server.
CAUSE
Connections with POST that are directed to IIS or another Web server behind ISA Server are not reused or closed. ISA Server does not use cached connections. Under certain load conditions, the number of open connections can overwhelm the Web server, causing it to crash or fail.
RESOLUTIONWARNING: If you use Registry Editor incorrectly, you may cause serious problems that may
require you to reinstall your operating system. Microsoft cannot guarantee that you can solve
problems that result from using Registry Editor incorrectly. Use Registry Editor at your own
risk.
To resolve this problem, obtain and install the latest service pack for ISA Server 2000, and then edit the registry.
For additional information about how to obtain the latest service pack for Microsoft Internet Security and Acceleration Server 2000, click the article number below
to view the article in the Microsoft Knowledge Base:
313139 How to Obtain the Latest Internet Security and Acceleration Server 2000 Service Pack
After you install the latest service pack for ISA Server 2000, use Registry Editor to create a DWORD value called AlwaysUseConnectCache with a value of 1 or true or yes in the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3Proxy\Parameters STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
This problem was corrected in ISA Server 2000 Service Pack 1.
| Modification Type: | Major | Last Reviewed: | 6/11/2002 |
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| Keywords: | kbenv kbprb KB305835 |
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