Microsoft KB Archive/939767

= Error message when an NFS client accesses a file on an NFS share in Windows Storage Server 2003, in Windows Server 2003 R2, or in Windows Services for UNIX 3.5: &quot;Stop 0x0000007E (SYSTEM_THREAD_EXCEPTION_NOT_HANDLED)&quot; =

Article ID: 939767

Article Last Modified on 11/27/2007

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APPLIES TO


 * Microsoft Windows Storage Server 2003
 * Microsoft Windows Services for UNIX 3.5
 * Microsoft Windows Server 2003 R2 Standard x64 Edition
 * Microsoft Windows Server 2003 R2 Standard Edition (32-bit x86)
 * Microsoft Windows Server 2003 R2 Enterprise x64 Edition
 * Microsoft Windows Server 2003 R2 Enterprise Edition (32-Bit x86)

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SYMPTOMS
A computer that is running Microsoft Windows Storage Server 2003, Windows Server 2003 R2, or Microsoft Windows Services for UNIX 3.5 may randomly stop responding. Additionally, you receive the following Stop error message:

Stop 0x0000007E (SYSTEM_THREAD_EXCEPTION_NOT_HANDLED)

You may experience this problem when the following conditions are both true:
 * A Network File System (NFS) client computer is used to access a file.
 * The file has the SYSTEM attribute set by using NFS.

The Stop error is more likely to occur in the following scenario:
 * The NFS client computer modifies the file attributes of a file.

For example, the NFS client computer modifies the owner attribute or the group attribute.
 * This file has had the SYSTEM attribute set.
 * The SYSTEM attribute was set by using Windows Storage Server or by using Windows Services for UNIX.



CAUSE
This problem occurs because of a problem in Server for NFS. When the following conditions are true, Server for NFS does not correctly detect asynchronous I/O completion operations for metadata read operations:
 * There is a handle for a file in the Server for NFS handle cache.
 * The handle in the Server for NFS handle cache was opened for asynchronous I/O because of an earlier request to Server for NFS.
 * The metadata for the file is not present in the Windows file system cache.

Under these conditions, Server for NFS does not detect the asynchronous I/O completions for the metadata read operation when Server for NFS tries to retrieve the file attribute metadata.

Therefore, Server for NFS continues without waiting for the I/O operation to finish. Some time later, the file system finishes the I/O operation. Then, the file system writes the I/O completion status to a location on the CPU stack that existed when the I/O operation started. If the stack location has been reused, memory corruption might occur. Therefore, the computer may stop responding.

Note The SYSTEM file attribute is not directly related to the problem that is described in this article. However, if this attribute is set, a timing issue is more likely to occur. This timing issue affects the way that the NTFS file system changes the way that the I/O operation finishes. Because the problem that is mentioned in this article is related to a timing issue, a change in the behavior of NTFS could affect the way that the Server for NFS problem affects the computer.



Hotfix installation information

 * The &quot;Server for NFS&quot; component is now part of the Windows Server 2003 R2 operating system. Installing Services for UNIX 3.5 on a Windows Server 2003 R2-based system to get NFS functionality is no longer required. It is now an optional Windows component and can be added to an R2 system by using the Add/Remove Windows Components Wizard.
 * The storage server package can only be installed in Windows Storage Server 2003.
 * The Services for UNIX 3.5 package can be installed on any Windows 2000-based, Windows XP-based, Windows Server 2003-based computer that is running Server for NFS service from Services for UNIX 3.5 software. However, the package may not be installed on a Windows Server 2003 R2-based computer.

Windows Server 2003 R2
A supported hotfix is now 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 this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
To apply this hotfix, your computer must be running Windows Server 2003 R2 with Service Pack 1 (SP1) or Windows Server 2003 R2 with Service Pack 2 (SP2) and Microsoft Services for NFS.

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 English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Storage Server 2003
A supported hotfix is now 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 this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next service pack that contains this hotfix.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
To apply this hotfix, your computer must be running Windows Storage Server 2003 with Service Pack 1 (SP1) or Windows Storage Server 2003 with Service Pack 2 (SP2).

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 English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Services for UNIX 3.5
A supported hotfix is now available from Microsoft. However, this hotfix is intended to correct only the problem that this article describes. Apply this hotfix only to systems that are experiencing this specific problem.

To resolve this problem, submit a request to Microsoft Online Customer Services to obtain the hotfix. To submit an online request to obtain the hotfix, visit the following Microsoft Web site:

http://go.microsoft.com/?linkid=6294451

Note If additional issues occur or 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. To create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Prerequisites
To install this hotfix, you must be running Windows Services for UNIX 3.5.

Restart requirement
You must restart the computer to apply the changes after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfix.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information, 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

Keywords: kberrmsg kbbug kbfix kbhotfixserver kbqfe kbpubtypekc KB939767

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