The MFC-based application that runs on the original release version of Windows Server 2003 leaks file handles when it opens files from a Samba share location (898902)

SYMPTOMS

Consider the following scenario:

You have a Microsoft Foundation Classes (MFC)-based application that runs on the original release version of Microsoft Windows Server 2003.
This application opens files that are shared from a Samba share location.

In this scenario, you notice that your application leaks file handles.

However, you do not experience this problem if one of the following conditions is true:

You run the application on a Microsoft Windows XP-based computer.
The application is linked to the Mfc42.dll file instead of to the Mfc42u.dll file.

CAUSE

This occurs because of a code problem in the version of MFC that is included with the original release version of Windows Server 2003.

When an application uses the CFile::Open() method to open a file from a Samba share location, the Mfc42u.dll file calls its internal function to create a new file handle. However, the Mfc42u.dll file does not call its internal function later to release this handle.

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Server 2003 Service Pack that contains this hotfix.

To resolve this problem immediately, 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

No prerequisites are required to apply this hotfix.

Restart requirement

You must restart your computer after you apply this hotfix.

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.

File name	File version	File size	Date	Time	Platform	SP requirement	Service branch
Mfc42.dll	6.6.8063.0	1,160,704	09-Jun-2005	17:50	x86	SP1	SP1QFE
Mfc42u.dll	6.6.8063.0	1,163,776	09-Jun-2005	17:50	x86	SP1	SP1QFE

MORE INFORMATION

For more information about this topic, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.