Large backlogs on Windows Server 2012 R2 or Windows Server 2012-based DFSR servers

Symptoms

Assume that you have Windows Server 2012 R2 or Windows Server 2012-based servers that use the Distributed File System Replication (DFSR) service. You have a DFSR replication topology in your environment. In this situation, you experience a spike of backlogs on a daily or weekly basis.

Cause

This issue occurs when the garbage collection task (GCTask) of DFSR updates the stale records. When a GCTask processes the version vector tombstone of a content set before the non-version vector tombstone, the task considers all the records that belong to the content set to be stale. Therefore, the records are refreshed, and the issue that is described in the "Symptoms" section occurs.

Resolution

To resolve this issue for Windows Server 2012 R2, install update rollup 2919355.
To resolve this issue for Windows Server 2012, install the hotfix that is described in this article.

Update information for Windows Server 2012 R2

For more information about how to obtain update 2919355, click the following article number to view the article in the Microsoft Knowledge Base:

2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014

Hotfix information for Windows Server 2012

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:

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

Prerequisites

To apply this hotfix, you must be running Windows Server 2012.

Registry information

To apply this hotfix, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

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 2012 file information notes Important Windows 8 and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8" 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, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table:

    Version

    Product

    Milestone

    Service branch

    6.2.920 0.16 xxx

    Windows Server 2012

    RTM

    GDR

    6.2.920 0.20xxx

    Windows Server 2012

    RTM

    LDR

  • GDR service branches contain only those fixes that are widely released to address widespread, critical issues. LDR service branches contain hotfixes in addition to widely released fixes.

  • 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 2012" section. MUM, MANIFEST and the associated security catalog (.cat) files, are very 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 2012

File name

File version

File size

Date

Time

Platform

Dfsrprovs.mof

Not applicable

75,761

25-Jul-2012

20:12

Not applicable

Dfsrress.dll

6.2.9200.16384

2,048

26-Jul-2012

02:33

x64

Dfsrs.exe

6.2.9200.20935

4,724,736

05-Feb-2014

23:36

x64


Status

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:

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

For more information about a similar issue in Windows Server 2008 R2, click the following article number to view the article in the Microsoft Knowledge Base:

2884176 Large backlogs on Windows Server 2008 R2 SP1-based DFSR servers

Additional file information for Windows Server 2012

Additional files for all supported x64-based versions of Windows Server 2012

File property

Value

File name

Amd64_0ea532705a61d8cf78f590b0a3965fcf_31bf3856ad364e35_6.2.9200.20935_none_6dde581efae10e62.manifest

File version

Not applicable

File size

712

Date (UTC)

06-Feb-2014

Time (UTC)

08:42

Platform

Not applicable

File name

Amd64_microsoft-windows-dfsr-core-serveronly_31bf3856ad364e35_6.2.9200.20935_none_f7160e8a4a7fa39b.manifest

File version

Not applicable

File size

37,695

Date (UTC)

06-Feb-2014

Time (UTC)

08:42

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,032

Date (UTC)

06-Feb-2014

Time (UTC)

08:42

Platform

Not applicable


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