In Windows Server 2008 R2, the DNS Server service might crash when it handles many concurrent queries that are submitted through the DNS server plug-in interface

Symptoms

Consider the following scenario:

  • You install the Domain Name System (DNS) Server role on a computer that is running Windows Server R2.

  • You use the DNS server plug-in interface to concurrently submit many queries for the same domain name to the DNS server.

In this scenario, the DNS Server service might crash.

Note A similar problem happens on a DNS Server service that is running on Windows Server 2003. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

932704 The DNS server may crash when you use the DNS server plug-in interface to submit many ANY queries to a Windows Server 2003-based DNS server

Cause

This problem occurs because the DNS Server service becomes corrupted when it handles concurrent queries that are submitted from a DNS server plug-in interface.

Resolution

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 that is 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, your computer must be running Windows Server 2008 R2. Additionally, the computer must have the DNS Server role installed.

Registry information

To use the hotfix that is in this package, 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.

Note To avoid rebooting, you can stop the DNS Server service before you install the hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

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 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 to 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 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 very important to maintaining 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 x64-based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Cache.dns

Not Applicable

3,198

10-Jun-2009

20:31

Not Applicable

Dns.exe

6.1.7600.20799

696,320

14-Sep-2010

05:19

x64

Dnsserver.events.xml

Not Applicable

609

10-Jun-2009

20:31

Not Applicable

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:

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 name

Amd64_584bcb1d905712e9892fa618c2c920fd_31bf3856ad364e35_6.1.7600.20799_none_8adaee707aee7191.manifest

File version

Not applicable

File size

710

Date (UTC)

14-Sep-2010

Time (UTC)

20:48

Platform

Not applicable

File name

Amd64_microsoft-windows-dns-server-service_31bf3856ad364e35_6.1.7600.20799_none_aa7daad60967b83e.manifest

File version

Not applicable

File size

158,131

Date (UTC)

14-Sep-2010

Time (UTC)

05:56

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

1,671

Date (UTC)

14-Sep-2010

Time (UTC)

20:48

Platform

Not Applicable

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