The Cluster service may stop responding on a Windows Server 2008 cluster node when an application performs VSS backup of files from a volume

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SYMPTOMS

The Cluster service may stop responding (hang) on a Windows Server 2008 cluster node when an application performs Volume Shadow Copy Service (VSS) backup of files from a volume.

The Cluster.log file may contain information that resembles the following:

864:fb0.01/21[03:02:04.887](000000) INFO [VSS] OnIdentify - Version X-1.4 Component Name Cluster Database
864:fb0.01/21[03:02:04.887](000000) INFO [VSS] OnIdentify - Add Files To File Group target path %WINDIR%\cluster\
864:fb0.01/21[03:02:04.887](000000) INFO [VSS] OnIdentify Returned true
864:fb0.01/21[03:02:05.792](000000) ERR mscs::ClusterVssWriter::FindClusterComponent: AssertionFailed(668)' because of 'failed assertion'(compCount > 0 is false)

Additionally, the following events are logged in the Application log.

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Event ID 1000

Source: Application Error
Date: Date_Time
Event ID: 1000
Level: Error
User: N/A
Computer: ComputerName
Description: Faulting application clussvc.exe, version 6.0.6001.17128, time stamp 0x477b2c7c, faulting module clussvc.exe, version 6.0.6001.17128, time stamp 0x477b2c7c, exception code 0xc0000005, fault offset MemoryAddress, Process_ID, application start time StartTime.

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Event ID 12305

Event Type: Error
Event Source: VSS
Event Category: None
Event ID: 12305
Date: Date
Time: Time
User: N/A
Computer: ComputerName
Description:
Volume Shadow Copy Service error: Volume/disk not connected or not found.
Error context: GetVolumeNameForVolumeMountPointW( \\?\Volume<GUID>\, ...).

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Event ID 12290

Source: VSS
Date: Date_Time
Event ID: 12290
Task Category: None
Level: Warning
User: N/A
Computer: ComputerName
Description:
Volume Shadow Copy Service warning: ASR writer Error 0x80070001. hr = 0x00000000.

Operation:
PrepareForBackup event
PrepareForBackup event

Context:
Execution Context: ASR Writer
Execution Context: Writer
Writer Class Id: GUID
Writer Name: ASR Writer
Writer Instance ID: GUID

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Event ID 16387

Log Name: Application
Source: SPP
Date: Date_Time
Event ID: 16387
Task Category: None
Level: Error
User: N/A
Computer: ComputerName
Description:
Shadow copy creation failed because of error reported by ASR Writer. More info: Incorrect function. (0x80070001).

Note to developers This problem may occur if the backup application prepares the backup by using an empty IVssWriterComponents parameter.

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CAUSE

A pointer variable in the IsClusterWriterPresent function of the ClusterVssWriter object points to each component in the input list in turn. This variable is not initialized to NULL. If the input list is empty, this variable contains a random address. Therefore, an access violation occurs when the Cluster service tries to deallocate the random address.

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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 this specific problem.

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, submit a request to 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 (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 the Cluster service on the Windows Server 2008 computer.

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.