This article describes a problem in which DNS client API call fails and could lead to service restart freeze in Windows Server 2012 R2 or Windows Server 2012. An update is available to fix this issue. Before you install this update, see the Prerequisites section.

Symptoms

This issue might occur when an application makes a call to the DNS client service. This creates a remote procedure call (RPC) to the DNS client service. The RPC binding might time out when multiple DNS queries are sent from applications. Therefore, the RPC call fails because of binding time-out and applications don't get responses from the DNS client service. When this happens during a service restart, it could cause service startup freeze. 

Cause

This problem occurs because the time-out value is hardcoded incorrectly.

How to get this update

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

Method 1: Windows Update

This update is provided as a Recommended update on Windows Update. For more information on how to run Windows Update, see How to get an update through Windows Update.

Method 2: Microsoft Download Center

The following files are available for download from the Microsoft Download Center.

Operating system

Update

All supported x64-based versions of Windows Server 2012 R2

Download Download the package now.

All supported x64-based versions of Windows Server 2012

Download Download the package now.



For more information about how to download Microsoft support files, select the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Update detail information

Prerequisites

To install this update, install April 2014, update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 (2919355) in Windows 8.1 or Windows Server 2012 R2.

Registry information

To apply this update, you don't have to make any changes to the registry.

Restart requirement

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

Update replacement information

This update doesn't replace a previously released update.

Status

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

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.

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

  • 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 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

Dnsapi.dll

6.3.9600.18192

657,920

10-Jan-2016

17:09

x64

Dnsrslvr.dll

6.3.9600.18192

252,416

10-Jan-2016

17:08

x64

Dnsapi.dll

6.3.9600.18192

498,688

10-Jan-2016

16:46

x86


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

    6.2.920 0.17xxx

    Windows Server 2012

    RTM

    GDR

    6.2.920 0.21xxx

    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 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

File name

File version

File size

Date

Time

Platform

Dnsapi.dll

6.2.9200.17623

623,616

10-Jan-2016

15:40

x64

Dnsrslvr.dll

6.2.9200.17623

212,992

10-Jan-2016

15:40

x64

Dnsapi.dll

6.2.9200.21743

606,208

10-Jan-2016

02:24

x64

Dnsrslvr.dll

6.2.9200.21743

210,944

10-Jan-2016

02:24

x64

Dnsapi.dll

6.2.9200.17623

458,752

10-Jan-2016

12:04

x86

Dnsapi.dll

6.2.9200.21743

462,336

10-Jan-2016

00:12

x86


x64 Windows Server 2012 R2

File property

Value

File name

Amd64_12c1b999a98c1d2a21b6a3061da2d04d_31bf3856ad364e35_6.3.9600.18192_none_00ae2a16f1cbb17a.manifest

File version

Not applicable

File size

709

Date (UTC)

11-Jan-2016

Time (UTC)

22:54

Platform

Not applicable

File name

Amd64_b95b552e78c979385718226cdb987905_31bf3856ad364e35_6.3.9600.18192_none_894962ad6b6de733.manifest

File version

Not applicable

File size

709

Date (UTC)

11-Jan-2016

Time (UTC)

22:54

Platform

Not applicable

File name

Amd64_microsoft-windows-dns-client-minwin_31bf3856ad364e35_6.3.9600.18192_none_863d11eef726c291.manifest

File version

Not applicable

File size

22,733

Date (UTC)

10-Jan-2016

Time (UTC)

19:36

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,227

Date (UTC)

11-Jan-2016

Time (UTC)

22:54

Platform

Not applicable

File name

Wow64_microsoft-windows-dns-client-minwin_31bf3856ad364e35_6.3.9600.18192_none_9091bc412b87848c.manifest

File version

Not applicable

File size

18,789

Date (UTC)

10-Jan-2016

Time (UTC)

18:35

Platform

Not applicable

x64 Windows Server 2012

File property

Value

File name

Amd64_2034c65aabc1283d1323c3dbefec7dac_31bf3856ad364e35_6.2.9200.17623_none_b9783a91ed99ad1e.manifest

File version

Not applicable

File size

709

Date (UTC)

11-Jan-2016

Time (UTC)

23:11

Platform

Not applicable

File name

Amd64_d7548dc0d892001f1729114c69d8c1a1_31bf3856ad364e35_6.2.9200.21743_none_1c96417f9111e3bf.manifest

File version

Not applicable

File size

709

Date (UTC)

11-Jan-2016

Time (UTC)

23:11

Platform

Not applicable

File name

Amd64_f76bd2ba8ef9de254720996f23b60fd1_31bf3856ad364e35_6.2.9200.21743_none_ec921bcb9e1beb20.manifest

File version

Not applicable

File size

709

Date (UTC)

11-Jan-2016

Time (UTC)

23:11

Platform

Not applicable

File name

Amd64_ff23fa7abde2b023dd48b9e345d9c99d_31bf3856ad364e35_6.2.9200.17623_none_0ddd97e9bb48f083.manifest

File version

Not applicable

File size

709

Date (UTC)

11-Jan-2016

Time (UTC)

23:11

Platform

Not applicable

File name

Amd64_microsoft-windows-dns-client-minwin_31bf3856ad364e35_6.2.9200.17623_none_ee95294cacba1ff6.manifest

File version

Not applicable

File size

22,070

Date (UTC)

10-Jan-2016

Time (UTC)

16:09

Platform

Not applicable

File name

Amd64_microsoft-windows-dns-client-minwin_31bf3856ad364e35_6.2.9200.21743_none_ef09263fc5e7f7a2.manifest

File version

Not applicable

File size

22,070

Date (UTC)

10-Jan-2016

Time (UTC)

02:50

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

2,228

Date (UTC)

11-Jan-2016

Time (UTC)

23:11

Platform

Not applicable

File name

Wow64_microsoft-windows-dns-client-minwin_31bf3856ad364e35_6.2.9200.17623_none_f8e9d39ee11ae1f1.manifest

File version

Not applicable

File size

18,372

Date (UTC)

10-Jan-2016

Time (UTC)

12:25

Platform

Not applicable

File name

Wow64_microsoft-windows-dns-client-minwin_31bf3856ad364e35_6.2.9200.21743_none_f95dd091fa48b99d.manifest

File version

Not applicable

File size

18,372

Date (UTC)

10-Jan-2016

Time (UTC)

00:42

Platform

Not applicable


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