The DNS Server service on an RODC does not respond to DNS queries for several minutes if the link to some RWDCs breaks in Windows Server 2008

Article ID: 981370 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You deploy a read-only domain controller (RODC) that is running Windows Server 2008 for a branch office. This branch office has only this domain controller.
  • You install the Domain Name System (DNS) server role on the RODC.
  • The RODC connects to some read/write domain controllers (RWDCs) in a remote central office through a wide area network (WAN) link.
  • The WAN link breaks.
In this scenario, the DNS Server service on the RODC does not reply to DNS queries. This issue lasts for several minutes, and then is resolved automatically.
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CAUSE

This issue occurs because one thread in the DNS Server service holds a critical section while it waits for a Lightweight Directory Access Protocol (LDAP) response from the remote RWDC. However, the thread releases the critical section after it receives the LDAP time-out error several minutes later because the WAN link is broken. Therefore, all threads that require the resource are blocked. These threads include a thread that responds to DNS queries.
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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 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 Web site:
http://support.microsoft.com/contactus/?ws=support
(http://support.microsoft.com/contactus/?ws=support)
Note 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 2008 or Windows Server 2008 Service Pack 2 (SP2) on your computer. Additionally, you must have the DNS server role installed on your computer.

For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
968849
(http://support.microsoft.com/kb/968849/ )
How to obtain the latest service pack for Windows Server 2008

Registry information

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756
(http://support.microsoft.com/kb/322756/ )
How to back up and restore the registry in Windows
After apply this hotfix, you must create a registry key. To do this, follow these steps:
  1. Click Start
    Collapse this imageExpand this image
    start button
    , type regedit in the Search programs and files box, and then press ENTER.
    Collapse this imageExpand this image
    UAC
    If you are prompted for an administrator password, type the password. If you are prompted for confirmation, provide confirmation.
  2. Locate and then click the following registry subkey:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters

  3. On the Edit menu, point to New, and then click DWORD Value.
  4. Type MaximumRodcRsoQueueLength, and then press ENTER.
  5. Right-click MaximumRodcRsoQueueLength, and then click Modify.
  6. In the Value data box, type 3, and then click OK.
  7. Exit Registry Editor.

Restart requirement

You must restart the computer after you apply this hotfix.

Note If you stop the DNS Server service before you install this hotfix, you do not have to restart the computer.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

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 2008 file information notes
Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" 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 Vista" 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.
    Collapse this tableExpand this table
    VersionProductSR_LevelService branch
    6.0.600 1 . 22xxxWindows Server 2008SP1LDR
    6.0.600 2 . 22xxxWindows Server 2008SP2LDR
  • Service Pack 1 is integrated into the release version of Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.
  • 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 and for Windows Vista" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely 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 x86-based versions of Windows Server 2008
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File nameFile versionFile sizeDateTimePlatform
Cache.dnsNot applicable3,17901-Apr-200918:54Not applicable
Dns.exe6.0.6001.22649510,46405-Mar-201014:44x86
Dnsserver.events.xmlNot applicable60901-Apr-200918:54Not applicable
Cache.dnsNot applicable3,17903-Apr-200920:42Not applicable
Dns.exe6.0.6002.22355510,97605-Mar-201013:38x86
Dnsserver.events.xmlNot applicable60903-Apr-200920:42Not applicable
For all supported x64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Cache.dnsNot applicable3,17901-Apr-200915:54Not applicable
Dns.exe6.0.6001.22649638,46405-Mar-201014:15x64
Dnsserver.events.xmlNot applicable60901-Apr-200915:54Not applicable
Cache.dnsNot applicable3,17903-Apr-200920:39Not applicable
Dns.exe6.0.6002.22355638,97605-Mar-201013:53x64
Dnsserver.events.xmlNot applicable60903-Apr-200920:39Not applicable
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STATUS

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

For more information about the branch office environment, visit the following Microsoft Web site:
General information about branch office environment
(http://technet.microsoft.com/en-us/library/dd735706(WS.10).aspx)
For more information about the DNS integer properties, visit the following Microsoft Web site:
General information about the DNS integer properties
(http://msdn.microsoft.com/en-us/library/cc422472(PROT.10).aspx)
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684
(http://support.microsoft.com/kb/824684/ )
Description of the standard terminology that is used to describe Microsoft software updates

Additional file information

Additional file information for Windows Server 2008

Additional files for all supported x86-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameUpdate.mum
File versionNot applicable
File size2,220
Date (UTC)08-Mar-2010
Time (UTC)05:39
PlatformNot applicable
File nameX86_1a1d77dfd072a197efd3bd360e83cd72_31bf3856ad364e35_6.0.6002.22355_none_6e9d7076645619fb.manifest
File versionNot applicable
File size706
Date (UTC)08-Mar-2010
Time (UTC)05:39
PlatformNot applicable
File nameX86_f08c58a4d37d0eddf42f0dda523c756d_31bf3856ad364e35_6.0.6001.22649_none_09fee65b17f94bb3.manifest
File versionNot applicable
File size706
Date (UTC)08-Mar-2010
Time (UTC)05:39
PlatformNot applicable
File nameX86_microsoft-windows-dns-server-service_31bf3856ad364e35_6.0.6001.22649_none_4e6d4ea8efca7e6b.manifest
File versionNot applicable
File size163,050
Date (UTC)05-Mar-2010
Time (UTC)18:36
PlatformNot applicable
File nameX86_microsoft-windows-dns-server-service_31bf3856ad364e35_6.0.6002.22355_none_5044ef7cecfc8a24.manifest
File versionNot applicable
File size163,376
Date (UTC)05-Mar-2010
Time (UTC)17:52
PlatformNot applicable
Additional files for all supported x64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameAmd64_9a72b3dde9b2972c6d08b67b6ac18778_31bf3856ad364e35_6.0.6002.22355_none_7676c5b00e655fab.manifest
File versionNot applicable
File size710
Date (UTC)08-Mar-2010
Time (UTC)05:39
PlatformNot applicable
File nameAmd64_ccf206385f1ea65a5a786d077f034d0b_31bf3856ad364e35_6.0.6001.22649_none_7cd11ef2dff3c4cc.manifest
File versionNot applicable
File size710
Date (UTC)08-Mar-2010
Time (UTC)05:39
PlatformNot applicable
File nameAmd64_microsoft-windows-dns-server-service_31bf3856ad364e35_6.0.6001.22649_none_aa8bea2ca827efa1.manifest
File versionNot applicable
File size163,090
Date (UTC)05-Mar-2010
Time (UTC)19:36
PlatformNot applicable
File nameAmd64_microsoft-windows-dns-server-service_31bf3856ad364e35_6.0.6002.22355_none_ac638b00a559fb5a.manifest
File versionNot applicable
File size163,418
Date (UTC)05-Mar-2010
Time (UTC)17:40
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size2,236
Date (UTC)08-Mar-2010
Time (UTC)05:39
PlatformNot applicable
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Properties

Article ID: 981370 - Last Review: October 6, 2011 - Revision: 2.0
APPLIES TO
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
Keywords: 
kbexpertiseadvanced kbsurveynew kbqfe kbfix kbautohotfix KB981370
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