FIX: Web applications that use the Jet database engine may stop responding under heavy load

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SYMPTOMS

Your Web applications that use the Microsoft Jet database engine may stop responding.

Note Microsoft Access uses the Jet database engine.

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This problem occurs because a bug exists in the Jet database engine. This problem occurs only on Microsoft Windows Server 2003.

In Windows Server 2003, COM+ changes how frequently the CoFreeUnusedLibraries function is called. This change causes the Jet drivers to reinitialize frequently. This behavior may cause a deadlock condition.

This problem occurs most frequently when the Web server is under a heavy load.

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RESOLUTION

Service pack information

To resolve this problem, obtain the latest service pack for Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 (http://support.microsoft.com/kb/889100/ ) How to obtain the latest service pack for Windows Server 2003

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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:

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

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

Before you install this hotfix, you must install the security update that is described in the following Microsoft Knowledge Base article:

837001 (http://support.microsoft.com/kb/837001/ ) MS04-014: Vulnerability in the Microsoft Jet Database Engine could permit code execution

Restart requirement

You must restart the computer after you apply this hotfix.

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
   -----------------------------------------------------
   17-May-2004  23:38  4.0.8704.0  241,693  Msjtes40.dll

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