This article describes an issue that occurs in a Windows Server 2012 R2-based multi-site failover cluster. A hotfix is available to fix this issue. The hotfix has a prerequisite.

Symptoms

Assume that you have a multi-site failover cluster that has a file share witness that's located on one of the sites. If connectivity is lost between the sites, the cluster may go into a "split brain" situation in which both sites think that the other side is down.

Hotfix information

Important If you install a language pack after you install this hotfix, you must reinstall this hotfix. Therefore, we recommend that you install any language packs that you need before you install this hotfix. For more information, see Add language packs to Windows.

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that's described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

If the hotfix is available for download, there's a "Hotfix Download Available" section at the top of this Knowledge Base article. If this section doesn't appear, submit a request to Microsoft Customer Service and Support to get 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 don't 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 don't see your language, it's because a hotfix isn't available for that language.

Prerequisites

To apply this hotfix, you must have April 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) installed in Windows Server 2012 R2.

Registry information

To apply this hotfix, you don't 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 doesn't replace a previously released hotfix.

Status

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

Cause

This issue occurs because the dynamic quorum updates the node weight in one off quorum.

References

Learn about the terminology that Microsoft uses to describe software updates.

File Information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). Be aware that dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time bias. The dates and times may also change when you perform certain operations on the files.

Important Windows 8.1 hotfixes and Windows Server 2012 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 8.1/Windows Server 2012 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.


Notes

  • 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:

    Version

    Product

    Milestone

    Service branch

    6.3.960 0.18xxx

    Windows Server 2012 R2

    RTM

    GDR

  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed in the "Additional file information" section. MUM, MANIFEST, and the associated security catalog (.cat) files, are very important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

x64 Windows Server 2012 R2

File name

File version

File size

Date

Time

Platform

Clussvc.exe

6.3.9600.18183

7,534,592

28-Dec-2015

22:11

x64


x64 Windows Server 2012 R2

File property

Value

File name

Amd64_4acf15886e4fae5b84426f9d1be8b3df_31bf3856ad364e35_6.3.9600.18184_none_0aedbe1ddb2ab92f.manifest

File version

Not applicable

File size

1,072

Date (UTC)

30-Dec-2015

Time (UTC)

04:28

Platform

Not applicable

File name

Amd64_microsoft-windows-f..overcluster-clussvc_31bf3856ad364e35_6.3.9600.18184_none_aa7fd7fc75830d08.manifest

File version

Not applicable

File size

9,346

Date (UTC)

29-Dec-2015

Time (UTC)

16:28

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

1,595

Date (UTC)

30-Dec-2015

Time (UTC)

04:28

Platform

Not applicable

File name

Wow64_microsoft-windows-f..overcluster-clussvc_31bf3856ad364e35_6.3.9600.18184_none_b4d4824ea9e3cf03.manifest

File version

Not applicable

File size

6,410

Date (UTC)

29-Dec-2015

Time (UTC)

16:19

Platform

Not applicable


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