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Symptoms

Consider the following scenario:

  • You install Microsoft WebDAV 7.5 for IIS on a computer that is running Internet Information Services (IIS) 7.0 or Internet Information Services (IIS) 7.5.

  • You enable the WebDAV feature on a website.

  • You create some WebDAV authoring rules.

  • Many WebDAV clients use the website to upload files, to download files, to access file directories, or to perform other operations that issue the WebDAV PROPFIND verb.

In this scenario, the memory usage for the W3wp.exe process becomes very large. Additionally, the computer that is running IIS might respond slower.

Cause

This issue occurs because of a memory leak in the Webdav.dll module.

Note The W3wp.exe process hosts the Webdav.dll module.

Resolution



Note: A public hotfix for IIS 7.0 is not currently available. You may refer to the Workaround section to work around the issue. To obtain a private hotfix for IIS 7.0, you might have to create a separate service request.

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that 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:

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, you must be running one of the following operating systems:

  • Windows 7

  • Windows 7 Service Pack 1 (SP1)

  • Windows Server 2008 R2

  • Windows Server 2008 R2 Service Pack 1 (SP1)

Additionally, you must have WebDAV 7.5 installed.

Restart requirement

You must restart the computer if the updated files are being used when you apply this hotfix. To avoid a restart of the computer, stop World Wide Web Publishing Service (W3wp.exe) before 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.

For all supported x86-based versions of Windows 7

File name

File version

File size

Date

Time

Platform

Webdav.dll

7.5.7600.21020

157,696

02-Aug-2011

04:34

x86

Webdav.dll

7.5.7601.21782

159,232

02-Aug-2011

19:28

x86

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Webdav.dll

7.5.7600.21020

185,344

02-Aug-2011

05:29

x64

Webdav.dll

7.5.7601.21782

186,368

02-Aug-2011

20:04

x64

For all supported IA-64–based versions of Windows Server 2008 R2

File name

File version

File size

Date

Time

Platform

Webdav.dll

7.5.7600.21020

457,728

02-Aug-2011

04:14

IA-64

Webdav.dll

7.5.7601.21782

460,288

02-Aug-2011

04:14

IA-64


Status

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

Workaround

To work around this issue, restart the IIS service.

More Information

For more information about how to install and configur WebDAV in IIS 7, visit the following Microsoft website:

How to install and configure WebDAV in IIS 7

Additional file information

Additional file information for Windows 7 and for Windows Server 2008 R2

Additional files for all supported x86-based versions of Windows 7

File name

Update.mum

File version

Not Applicable

File size

2,868

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

X86_0e1f78ec48f929392f9df8860c767397_31bf3856ad364e35_6.1.7601.21782_none_308dc0191151dbf4.manifest

File version

Not Applicable

File size

706

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

X86_e8d46320b7dc08d71a6a1f7bd89a31da_31bf3856ad364e35_6.1.7600.21020_none_4c3f50584f8c44e5.manifest

File version

Not Applicable

File size

706

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

X86_microsoft-windows-iis-webdavbinaries_31bf3856ad364e35_6.1.7600.21020_none_6aed25ecaa7ad423.manifest

File version

Not Applicable

File size

4,743

Date (UTC)

02-Aug-2011

Time (UTC)

22:58

Platform

Not Applicable

File name

X86_microsoft-windows-iis-webdavbinaries_31bf3856ad364e35_6.1.7601.21782_none_6c94cbdca7cfe721.manifest

File version

Not Applicable

File size

4,743

Date (UTC)

02-Aug-2011

Time (UTC)

22:58

Platform

Not Applicable

Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

File name

Amd64_9eeaa584e32f43a8e34b46d15302f7c4_31bf3856ad364e35_6.1.7601.21782_none_26cfd399c86e9087.manifest

File version

Not Applicable

File size

1,062

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

Amd64_fa4091b26afac76886370f8ac05d5ae9_31bf3856ad364e35_6.1.7600.21020_none_d0e136b6194c4262.manifest

File version

Not Applicable

File size

1,062

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

Amd64_microsoft-windows-iis-webdavbinaries_31bf3856ad364e35_6.1.7600.21020_none_c70bc17062d84559.manifest

File version

Not Applicable

File size

4,749

Date (UTC)

02-Aug-2011

Time (UTC)

23:01

Platform

Not Applicable

File name

Amd64_microsoft-windows-iis-webdavbinaries_31bf3856ad364e35_6.1.7601.21782_none_c8b36760602d5857.manifest

File version

Not Applicable

File size

4,749

Date (UTC)

02-Aug-2011

Time (UTC)

23:01

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

3,306

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

Wow64_microsoft-windows-iis-webdavbinaries_31bf3856ad364e35_6.1.7600.21020_none_d1606bc297390754.manifest

File version

Not Applicable

File size

4,408

Date (UTC)

02-Aug-2011

Time (UTC)

23:01

Platform

Not Applicable

File name

Wow64_microsoft-windows-iis-webdavbinaries_31bf3856ad364e35_6.1.7601.21782_none_d30811b2948e1a52.manifest

File version

Not Applicable

File size

4,408

Date (UTC)

02-Aug-2011

Time (UTC)

23:01

Platform

Not Applicable

Additional files for all supported IA-64–based versions of Windows Server 2008 R2


File name

Ia64_5dc7063a82c1b95968df214550a29d78_31bf3856ad364e35_6.1.7600.21020_none_e2d93effeb39cd66.manifest

File version

Not Applicable

File size

1,060

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

Ia64_6522d36ca2d5c9c66ddec75cac5e2719_31bf3856ad364e35_6.1.7601.21782_none_30dd320452ea97fe.manifest

File version

Not Applicable

File size

1,060

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

Ia64_microsoft-windows-iis-webdavbinaries_31bf3856ad364e35_6.1.7600.21020_none_6aeec9e2aa78dd1f.manifest

File version

Not Applicable

File size

4,746

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

Ia64_microsoft-windows-iis-webdavbinaries_31bf3856ad364e35_6.1.7601.21782_none_6c966fd2a7cdf01d.manifest

File version

Not Applicable

File size

4,746

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

Update.mum

File version

Not Applicable

File size

2,347

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

Wow64_microsoft-windows-iis-webdavbinaries_31bf3856ad364e35_6.1.7600.21020_none_d1606bc297390754.manifest

File version

Not Applicable

File size

4,408

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable

File name

Wow64_microsoft-windows-iis-webdavbinaries_31bf3856ad364e35_6.1.7601.21782_none_d30811b2948e1a52.manifest

File version

Not Applicable

File size

4,408

Date (UTC)

02-Aug-2011

Time (UTC)

22:55

Platform

Not Applicable


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