Microsoft KB Archive/944804

= Distributed File System Replication in Windows Server 2003 R2 performs unnecessary replication when an antivirus application is installed =

Article ID: 944804

Article Last Modified on 11/20/2007

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APPLIES TO


 * Microsoft Windows Server 2003 R2 Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003 R2 Enterprise Edition (32-Bit x86)
 * Microsoft Windows Server 2003 R2 Datacenter Edition (32-Bit x86)
 * Microsoft Windows Server 2003 R2 Standard x64 Edition
 * Microsoft Windows Server 2003 R2 Enterprise x64 Edition
 * Microsoft Windows Server 2003 R2 Datacenter x64 Edition

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SYMPTOMS
Consider the following scenario:
 * Distributed File System Replication (DFSR) is running to replicate data between Windows Server 2003 R2-based computers.
 * An antivirus application is installed on one or more members of a replication group.
 * Real-time protection is enabled in the antivirus application.

In this scenario, the antivirus application may generate high CPU usage. Additionally, many unnecessary replications occur on the DFSR servers.

Sometimes, the following event is logged in the DFSR log: Event Type: Information

Event Source: DFSR

Event Category: None

Event ID: 4412

Date:

Time:

User: N/A

Computer:

Description:

The DFS Replication service detected that a file was changed on multiple servers. A conflict resolution algorithm was used to determine the winning file. The losing file was moved to the Conflict and Deleted folder.

Additional Information:

Original File Path:

New Name in Conflict Folder:

Replicated Folder Root:

File ID:

Replicated Folder Name:

Replicated Folder ID:

Replication Group Name:

Replication Group ID:

Member ID:



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 on the computer. 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 must 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 R2 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
In a typical scenario where this problem occurs, DFSR and Microsoft Forefront Client Security are installed on the same computer. Other antivirus applications may also have this problem, depending on the APIs that they use.

