The Server for NFS does not respond when the server is processing lots of data in Windows Server 2008

Applies to: Windows Server 2008 DatacenterWindows Server 2008 Datacenter without Hyper-VWindows Server 2008 Enterprise More

Symptoms


You install a Server for Network File System (NFS) on a computer that is running Windows Server 2008. When the server tries to perform a directory concurrent listing operation on a large folder while the server is processing lots of data, the server may stop responding. Sometimes you receive an error message that resembles the following:

NFS server unresponsive.

Cause


This problem occurs because of a race condition in the way Server for NFS processes the Readdir and ReaddirPlus remote procedure calls (RPC) .

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 website: 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 Service Pack 2 (SP2). Additionally, you must install the NFS role on the 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 How to obtain the latest service pack for Windows Server 2008

Restart requirement

You must restart the computer after you apply this hotfix.

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.
    VersionProductSR_LevelService branch
    6.0.600
    2.
    22xxx
    Windows Server 2008SP2LDR
  • 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" section. MUM files 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 Server 2008
File nameFile versionFile sizeDateTimePlatform
Msnfsflt.mofNot applicable4,43703-Apr-200922:41Not applicable
Msnfsflt.sys6.0.6002.2252023,55208-Nov-201019:03x86
Nfs-servercore-ppdlic.xrm-msNot applicable3,00108-Nov- 201021:23Not applicable
Nfssvc.exe6.0.6002.2252028,67208-Nov-201019:03x86
Nfssvr.mofNot applicable6,17203-Apr- 200922:42Not applicable
Nfssvr.sys6.0.6002.22520496,64008-Nov-201019:03x86
For all supported x64-based versions of Windows Server 2008
File nameFile versionFile sizeDateTimePlatform
Msnfsflt.mofNot applicable4,43703-Apr-200921:06Not applicable
Msnfsflt.sys6.0.6002.2252030,20808-Nov-201020:17x64
Nfs-servercore-ppdlic.xrm-msNot applicable3,00108-Nov- 201022:39Not applicable
Nfssvc.exe6.0.6002.2252033,28008-Nov-201020:17x64
Nfssvr.mofNot applicable6,17203-Apr- 200921:06Not applicable
Nfssvr.sys6.0.6002.22520642,56008-Nov-201020:18x64
For all supported IA-64-based versions of Windows Server 2008
File nameFile versionFile sizeDateTimePlatform
Msnfsflt.mofNot applicable4,43703-Apr-200921:06Not applicable
Msnfsflt.sys6.0.6002.2252065,02408-Nov-201018:17IA-64
Nfs-servercore-ppdlic.xrm-msNot applicable3,00108-Nov- 201020:21Not applicable
Nfssvc.exe6.0.6002.2252067,58408-Nov-201018:17IA-64
Nfssvr.mofNot applicable6,17203-Apr- 200921:06Not applicable
Nfssvr.sys6.0.6002.225201,409,53608-Nov-201018:18IA-64

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

Additional files for all supported x86-based versions of Windows Server 2008
File nameX86_microsoft-windows-nfs-servercore_31bf3856ad364e35_6.0.6002.22520_none_5dff24991d9fcbdf.manifest
File versionNot applicable
File size50,906
Date (UTC)08-Nov-2010
Time (UTC)21:54
Additional files for all supported x64-based versions of Windows Server 2008
File nameAmd64_microsoft-windows-nfs-servercore_31bf3856ad364e35_6.0.6002.22520_none_ba1dc01cd5fd3d15.manifest
File versionNot applicable
File size50,940
Date (UTC)08-Nov-2010
Time (UTC)23:11
Additional files for all supported IA-64-based versions of Windows Server 2008
File nameIa64_microsoft-windows-nfs-servercore_31bf3856ad364e35_6.0.6002.22520_none_5e00c88f1d9dd4db.manifest
File versionNot applicable
File size50,923
Date (UTC)08-Nov-2010
Time (UTC)20:46