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=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 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 |