Important The hotfix that corresponds to KB 2908415 has been included with the hotfix KB 2878635, which contains all fixes that were previously included in KB 2908415.

Symptoms

Consider the following scenario:

  • You have a Windows Server 2012 Hyper-V host server.

  • You have the server in a cluster environment, and you use cluster shared volumes.

  • You try to back up a virtual machine (VM).


In this scenario, you may find that the cluster shared volumes go offline, and resource failover occurs on the other cluster nodes. Then, other VMs also go offline, or the Cluster service stops.

Cause

This problem occurs when there are many snapshots in the VM. This causes the Plug and Play (PnP) functionality on the host to be overwhelmed, and other critical cluster activity cannot finish.

Known issue

After you apply this hotfix and update the integration service in virtual machines, any snapshots that are older than 30 days and additional snapshots that are more than six are deleted in virtual machines. Additionally, event ID 16 that resembles the following is logged in the Application log:


Solution
The function can be disabled by setting the following registry in virtual machines. However, the issue that is described in this article might occur after that.

Registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Virtualization\VssRequestor

DWORD: SnapshotAreaRemoval

Value: 0 (Disable)


Resolution

Hotfix information

A supported hotfix is available from Microsoft Support. 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, go to 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 have Service Pack 1 for Windows 7 or Windows Server 2008 R2 installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

The hotfix that corresponds to KB 2908415 has been included with the hotfix KB 2878635, which contains all fixes that were previously included in KB 2908415. You should use the hotfix KB 2878635 to fix the issues described in KB 2908415. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

2878635 Update is available that improves the resiliency of the cloud service provider in Windows Server 2012: December 2013

The English (United States) 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 8 and Windows Server 2012 file information and notesImportant 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, 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

    6.2.920 0.16 xxx

    Windows 8 and Windows Server 2012

    RTM

    GDR

    6.2.920 0.20 xxx

    Windows 8 and Windows Server 2012

    RTM

    LDR

  • 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 8 and Windows Server 2012" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely 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.

For all supported x86-based versions of Windows 8

File name

File version

File size

Date

Time

Platform

Icsvc.dll

6.2.9200.20869

283,648

04-Nov-2013

23:23

x86

Vmapplicationhealthmonitorproxy.dll

6.2.9200.16384

10,240

26-Jul-2012

00:57

x86

Vmicres.dll

6.2.9200.20869

161,792

06-Nov-2013

23:41

x86

Vmictimeprovider.dll

6.2.9200.16384

52,736

26-Jul-2012

01:27

x86

For all supported x64-based versions of Windows 8 and Windows Server 2012

File name

File version

File size

Date

Time

Platform

Windows5.x-hypervintegrationservices-x64.msi

Not applicable

1,716,224

09-Nov-2013

09:50

Not applicable

Windows5.x-hypervintegrationservices-x64.xml

Not applicable

130

09-Nov-2013

01:45

Not applicable

Windows6.x-hypervintegrationservices-x64.xml

Not applicable

167

09-Nov-2013

01:45

Not applicable

Windows5.x-hypervintegrationservices-x86.msi

Not applicable

1,462,272

09-Nov-2013

07:47

Not applicable

Windows5.x-hypervintegrationservices-x86.xml

Not applicable

130

09-Nov-2013

01:48

Not applicable

Windows6.x-hypervintegrationservices-x86.xml

Not applicable

167

09-Nov-2013

01:48

Not applicable


Status

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

Additional file information for Windows 8 and Windows Server 2012

Additional files for all supported x86-based versions of Windows 8

File name

Package_1_for_kb2908415~31bf3856ad364e35~x86~~6.2.1.0.mum

File version

Not applicable

File size

1,851

Date (UTC)

07-Nov-2013

Time (UTC)

11:08

Platform

Not applicable

File name

Package_2_for_kb2908415~31bf3856ad364e35~x86~~6.2.1.0.mum

File version

Not applicable

File size

1,841

Date (UTC)

07-Nov-2013

Time (UTC)

11:08

Platform

Not applicable

File name

Package_for_kb2908415_rtm~31bf3856ad364e35~x86~~6.2.1.0.mum

File version

Not applicable

File size

1,980

Date (UTC)

07-Nov-2013

Time (UTC)

11:08

Platform

Not applicable

File name

X86_09c220d4fc919db6ec7e7b9a7490b8c8_31bf3856ad364e35_6.2.9200.20871_none_370bd6747e580d5a.manifest

File version

Not applicable

File size

708

Date (UTC)

07-Nov-2013

Time (UTC)

11:08

Platform

Not applicable

File name

X86_microsoft-hyper-v-integration-services_31bf3856ad364e35_6.2.9200.20871_none_9f0211c5dafe6d5e.manifest

File version

Not applicable

File size

28,183

Date (UTC)

07-Nov-2013

Time (UTC)

11:08

Platform

Not applicable

Additional files for all supported x64-based versions of Windows 8 and Windows Server 2012

File name

Amd64_926c2baa12548bae6d8c74f11619dd10_31bf3856ad364e35_6.2.9200.20873_none_1d3cccf1b2d65061.manifest

File version

Not applicable

File size

1,082

Date (UTC)

09-Nov-2013

Time (UTC)

18:35

Platform

Not applicable

File name

Amd64_c74dcb64cdc534b68646a11e7b8148a6_31bf3856ad364e35_6.2.9200.20873_none_d7410fe82fb0c6bc.manifest

File version

Not applicable

File size

1,082

Date (UTC)

09-Nov-2013

Time (UTC)

18:35

Platform

Not applicable

File name

Amd64_microsoft-hyper-v-g..aller-win5x-package_31bf3856ad364e35_6.2.9200.20873_none_2b8a45502d2ebb81.manifest

File version

Not applicable

File size

3,165

Date (UTC)

09-Nov-2013

Time (UTC)

09:53

Platform

Not applicable

File name

Amd64_microsoft-hyper-v-g..aller-win6x-package_31bf3856ad364e35_6.2.9200.20873_none_2dc0af626b85eef2.manifest

File version

Not applicable

File size

4,261

Date (UTC)

09-Nov-2013

Time (UTC)

10:09

Platform

Not applicable

File name

Package_1_for_kb2908415~31bf3856ad364e35~amd64~~6.2.3.0.mum

File version

Not applicable

File size

3,233

Date (UTC)

09-Nov-2013

Time (UTC)

18:35

Platform

Not applicable

File name

Package_2_for_kb2908415~31bf3856ad364e35~amd64~~6.2.3.0.mum

File version

Not applicable

File size

3,010

Date (UTC)

09-Nov-2013

Time (UTC)

18:35

Platform

Not applicable

File name

Package_for_kb2908415_rtm~31bf3856ad364e35~amd64~~6.2.3.0.mum

File version

Not applicable

File size

2,177

Date (UTC)

09-Nov-2013

Time (UTC)

18:35

Platform

Not applicable

File name

X86_microsoft-hyper-v-g..aller-win5x-package_31bf3856ad364e35_6.2.9200.20873_none_cf6ba9cc74d14a4b.manifest

File version

Not applicable

File size

3,159

Date (UTC)

09-Nov-2013

Time (UTC)

07:50

Platform

Not applicable

File name

X86_microsoft-hyper-v-g..aller-win6x-package_31bf3856ad364e35_6.2.9200.20873_none_d1a213deb3287dbc.manifest

File version

Not applicable

File size

4,253

Date (UTC)

09-Nov-2013

Time (UTC)

08:03

Platform

Not applicable


References

See the terminology Microsoft uses to describe software updates for more information.

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