ASP File Cache Is Deleted After a Network Error

Active Server Pages (ASP) caches the files that it serves, and ASP uses change notifications to determine when a cached file must be updated. When the content lives on a remote Universal Naming Convention (UNC) share, Internet Information Services (IIS) may return HTTP 500 error messages to the client.

When a netwok error occurs between the IIS server and the remote file server, the file is deleted from the ASP cache. If the client requests the ASP page again, IIS returns HTTP 500 error messages to the client.

Hotfix Information

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.

Prerequisites

No prerequisites are required.

Restart Requirement

After you install this hotfix, you must restart IIS.

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) 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.

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

WARNING: 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.

After you apply this hotfix, you can control its behavior through the following registry key: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\ASP\Parameters\DisableCachedResponseOnUNCAccessFailure By default, the value of this key is set to 0 (that is, the new behavior is enabled). To disable this behavior, set the value of this key to 1.