The DFS Replication service leaks download tasks, and an outgoing replication backlog occurs in Windows Server 2008 R2


Consider the following scenario:
  • You install the Distributed File System (DFS) Replication service on a computer that is running Windows Server 2008 R2.
  • The computer is a downstream server that replicates files from many partners that are known as upstream servers.
  • There are lots of backlogged files and folders that are pending replication.
In this scenario, the files and folders are not replicated, and the replication backlog does not subside correctly.

This issue usually occurs on a Hub server. This Hub server is a downstream server that replicates lots of small size files from many upstream servers.


The issue occurs because the DFS Replication service incorrectly leaks download tasks. Therefore, there is no available download task to process the backlog.


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 the problem described in this article. 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 website: 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.


To apply this hotfix, the computer must be running Windows Server 2008 R2 or Windows Server 2008 R2 Service Pack 1 (SP1).

Registry information

To use the hotfix, you do not have to change the registry.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, milestone (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:
    VersionProductMilestoneService branch
    Windows Server 2008 R2RTMLDR
    Windows Server 2008 R2SP1GDR
    Windows Server 2008 R2SP1LDR
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x64-based versions of Windows Server 2008 R2
File nameFile versionFile sizeDateTimePlatform
Dfsrprovs.mofNot Applicable75,20013-Jul-200920:20Not Applicable
Dfsrprovs.mofNot Applicable75,20020-Nov-201003:51Not Applicable


To work around the issue, restart the DFS Replication service or issue a Sync Now command to force DFS Replication.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" 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 file information

Additional file information for Windows Server 2008 R2

Additional files for all supported x64-based versions of Windows Server 2008 R2
File nameAmd64_microsoft-windows-dfsr-core-serveronly_31bf3856ad364e35_6.1.7600.20896_none_fa00775eda9d1eca.manifest
File versionNot Applicable
File size35,681
Date (UTC)04-Feb-2011
Time (UTC)18:44
PlatformNot Applicable
File nameAmd64_microsoft-windows-dfsr-core-serveronly_31bf3856ad364e35_6.1.7601.21654_none_fc101380d7a4e844.manifest
File versionNot Applicable
File size35,681
Date (UTC)04-Feb-2011
Time (UTC)18:44
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size3,661
Date (UTC)04-Feb-2011
Time (UTC)18:44
PlatformNot Applicable

ID d'article : 2461385 - Dernière mise à jour : 10 févr. 2011 - Révision : 1