Microsoft KB Archive/942843

= The NTBackup.exe tool stops responding if there are lots of registry entries under the FilesNotToBackup subkey on a Windows Server 2003-based computer =

Article ID: 942843

Article Last Modified on 10/22/2007

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APPLIES TO


 * Microsoft Windows Server 2003, Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003, Web Edition
 * Microsoft Windows Server 2003, Enterprise Edition
 * Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
 * Microsoft Windows Server 2003, Standard x64 Edition
 * Microsoft Windows Server 2003, 64-Bit Enterprise Edition
 * Microsoft Windows Server 2003, Datacenter x64 Edition
 * Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
 * Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems

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SYMPTOMS
Consider the following scenario:
 * On a Windows Server 2003-based computer, you use the Backup tool (NTBackup.exe) to perform a backup.
 * This backup does not include the system state data.

In this scenario, the backup process stops responding when the following status message is displayed:

Preparing to back up using shadow copy...

Therefore, you cannot complete the backup. Additionally, the following event may be logged in the Application log: Event Type: Error

Event Source: Application Hang

Event Category: (101)

Event ID: 1002

Date:

Time:

User: N/A

Computer:

Description:

Hanging application ntbackup.exe, version 5.2.3790.3959, hang module hungapp, version 0.0.0.0, hang address 0x00000000.

This problem occurs if the registry entries under the following subkey total more than 65,536 characters:

This situation typically occurs when there are lots of registry entries under the FilesNotToBackup subkey. In a typical scenario, these registry entries are generated by the Distributed File System Replication (DFSR) service.



CAUSE
This problem occurs because the NTBackup.exe tool incorrectly indexes registry entries under the FilesNotToBackup subkey. If there are too many registry entries exist under the FilesNotToBackup subkey, this may trigger an overflow situation.



Hotfix information
A supported hotfix is now 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 Windows Server 2003 service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

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

Prerequisites
To apply this hotfix, you must have Windows Server 2003 Service Pack 1 or Windows Server 2003 Service Pack 2 installed. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

889100 How to obtain the latest service pack for Windows Server 2003

Restart requirement
You do not have to restart the 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 item in Control Panel.

Windows Server 2003 with Service Pack 2, x64-based versions


STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information about software update terminology, 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

Additional query words: ntbackup hangs

Keywords: kbbug kbfix kbqfe kbpubtypekc kbexpertiseinter kbhotfixserver kbwinserv2003postsp2fix KB942843

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