Microsoft KB Archive/823272

= Client Programs Stop Responding While They Wait for File Locking to Occur =

Article ID: 823272

Article Last Modified on 6/5/2007

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APPLIES TO


 * Microsoft Windows XP Professional
 * Microsoft Windows XP Home Edition
 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Professional Edition
 * Microsoft Windows 2000 Advanced Server

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SYMPTOMS
In a client-server environment, where multiple client programs perform file locking on a data file that is located on the file server, all the client programs may stop responding (hang).



CAUSE
This problem may occur if the client program performs a particular sequence of lock requests on the data file, and as a result, the client program that is granted the lock never receives the lock. This problem occurs because of a redirector opportunistic locking issue.



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

322389 How to obtain the latest Windows XP service pack

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 XP 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 phone 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.

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) 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.    Windows 2000 Date        Time   Version        Size     File name --      20-Jun-2003  03:29  5.0.2195.6760  407,792  Mrxsmb.sys 20-Jun-2003 03:29  5.0.2195.6760  169,520  Rdbss.sys Windows XP      Date         Time    Version       Size     File name --         26-Jun-2003  12:00  5.1.2600.1239   92,160  Cscdll.dll 24-Jun-2003 03:11  5.1.2600.1239  401,920  Mrxsmb.sys 24-Jun-2003 03:11  5.1.2600.1239  156,160  Rdbss.sys



WORKAROUND
To work around this problem, disable opportunistic locking either on all the client computers or on the file server computer. For additional information about how to disable opportunistic locking, click the following article number to view the article in the Microsoft Knowledge Base:

129202 PC Ext: Explanation of Opportunistic Locking on Windows NT



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section. This problem was first corrected in Microsoft Windows XP Service Pack 2.



MORE INFORMATION
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

Keywords: kbhotfixserver kbqfe kbwinxpsp2fix kbwinxppresp2fix kbbug kbfix kbqfe kbwin2000presp5fix KB823272

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