VSS requestor instances fail when you start multiple VSS requestor instances with a VSS hardware provider to delete snapshots in Windows Server 2003

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Article ID: 957778 - View products that this article applies to.
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SYMPTOMS

You start multiple Volume Shadow Copy (VSS) requestor instances with a VSS hardware provider to delete snapshots in Windows Server 2003. However, each VSS requestor instance takes an increasingly longer time to finish. Eventually, the VSS requestor instances fail. Additionally, the VSS hardware provider database increases with each duplicated snapshot.

CAUSE

This problem occurs because the VSS service uses a Boolean member variable to track whether a snapshot set must be loaded. However, access to the variable is not serialized. Therefore, when multiple calls access this variable at the same time, the snapshots are loaded repeatedly into the database. Therefore, the VSS hardware provider database keeps growing.

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
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 have Windows Server 2003 Service Pack 1 (SP1) or Windows Server 2003 Service Pack 2 (SP2) installed. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
889100 How to obtain the latest service pack for Windows Server 2003

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

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 Server 2003 with Service Pack 1, x86-based versions
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File nameFile versionFile sizeDateTimePlatformSP requirement
Eventcls.dll5.2.3790.321231,23215-Sep-200817:01x86SP1
Ftdisk.sys5.2.3790.3212137,21615-Sep-200811:38x86SP1
Partmgr.sys5.2.3790.321225,08815-Sep-200812:15x86SP1
Swprv.dll5.2.3790.3212286,72015-Sep-200817:01x86SP1
Volsnap.sys5.2.3790.3212168,44815-Sep-200811:38x86SP1
Vssadmin.exe5.2.3790.3212134,14415-Sep-200811:38x86SP1
Vssapi.dll5.2.3790.3212568,83215-Sep-200817:01x86SP1
Vssui.dll5.2.3790.3212144,38415-Sep-200817:01x86SP1
Vssvc.exe5.2.3790.3212837,12015-Sep-200811:38x86SP1
Vss_ps.dll5.2.3790.321220,48015-Sep-200817:01x86SP1
Windows Server 2003 with Service Pack 2, x86-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirement
Swprv.dll5.2.3790.4375286,72015-Sep-200816:38x86SP2
Vssvc.exe5.2.3790.4375837,12015-Sep-200811:47x86SP2
Swprv.dll5.2.3790.4375286,72015-Sep-200816:38x86SP2
Vssvc.exe5.2.3790.4375837,12015-Sep-200811:47x86SP2
Windows Server 2003 with Service Pack 1, Itanium-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Eventcls.dll5.2.3790.321282,43215-Sep-200815:01IA-64SP1Not Applicable
Ftdisk.sys5.2.3790.3212499,20015-Sep-200815:01IA-64SP1Not Applicable
Partmgr.sys5.2.3790.321283,45615-Sep-200815:01IA-64SP1Not Applicable
Volsnap.sys5.2.3790.3212504,83215-Sep-200815:01IA-64SP1Not Applicable
Vssui.dll5.2.3790.3212407,55215-Sep-200815:01IA-64SP1Not Applicable
Vss_ps.dll5.2.3790.321233,28015-Sep-200815:01IA-64SP1Not Applicable
Swprv.dll5.2.3790.3212863,74415-Sep-200815:01IA-64SP1Not Applicable
Vssadmin.exe5.2.3790.3212313,85615-Sep-200815:01IA-64SP1Not Applicable
Vssapi.dll5.2.3790.32121,661,44015-Sep-200815:01IA-64SP1Not Applicable
Vssvc.exe5.2.3790.32122,588,16015-Sep-200815:02IA-64SP1Not Applicable
Wvssapi.dll5.2.3790.3212568,83215-Sep-200815:02x86SP1WOW
Wvss_ps.dll5.2.3790.321220,48015-Sep-200815:02x86SP1WOW
Windows Server 2003 with Service Pack 2, Itanium-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirement
Swprv.dll5.2.3790.4375863,74415-Sep-200815:06IA-64SP2
Vssvc.exe5.2.3790.43752,588,16015-Sep-200815:06IA-64SP2
Windows Server 2003 with Service Pack 1, x64-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirementService branch
Eventcls.dll5.2.3790.321246,08015-Sep-200815:02x64SP1Not Applicable
Ftdisk.sys5.2.3790.3212240,12815-Sep-200815:02x64SP1Not Applicable
Partmgr.sys5.2.3790.321245,05615-Sep-200815:02x64SP1Not Applicable
Volsnap.sys5.2.3790.3212326,14415-Sep-200815:02x64SP1Not Applicable
Vssui.dll5.2.3790.3212233,47215-Sep-200815:02x64SP1Not Applicable
Vss_ps.dll5.2.3790.321226,62415-Sep-200815:02x64SP1Not Applicable
Swprv.dll5.2.3790.3212688,12815-Sep-200815:02x64SP1Not Applicable
Vssadmin.exe5.2.3790.3212245,24815-Sep-200815:02x64SP1Not Applicable
Vssapi.dll5.2.3790.32121,338,88015-Sep-200815:02x64SP1Not Applicable
Vssvc.exe5.2.3790.32122,063,36015-Sep-200815:02x64SP1Not Applicable
Wvssapi.dll5.2.3790.3212568,83215-Sep-200815:02x86SP1WOW
Wvss_ps.dll5.2.3790.321220,48015-Sep-200815:02x86SP1WOW
Windows Server 2003 with Service Pack 2, x64-based versions
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatformSP requirement
Swprv.dll5.2.3790.4375688,12815-Sep-200815:08x64SP2
Vssvc.exe5.2.3790.43752,063,36015-Sep-200815:08x64SP2

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, click the following article number to view the article in the Microsoft Knowledge Base:
959476 A VSS hardware snapshot database keeps growing with duplicated snapshot information when it is updated for snapshot creation/deletion in Windows Server 2008 or in Windows Vista Service Pack 1 systems

Properties

Article ID: 957778 - Last Review: October 8, 2011 - Revision: 2.0
APPLIES TO
  • Microsoft Windows Server 2003, Standard Edition (32-bit x86)
  • Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
  • Microsoft Windows Server 2003, Datacenter Edition (32-bit x86)
  • Microsoft Windows Server 2003, Standard x64 Edition
  • Microsoft Windows Server 2003, Enterprise x64 Edition
  • Microsoft Windows Server 2003, Datacenter x64 Edition
  • Microsoft Windows Server 2003, Enterprise Edition for Itanium-based Systems
  • Microsoft Windows Server 2003, Datacenter Edition for Itanium-Based Systems
Keywords: 
kbautohotfix kbexpertiseinter kbfix kbbug kbsurveynew kbqfe KB957778

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