The handle count of the system process keeps increasing in Windows Server 2008, in Windows Vista, in Windows 7 or in Windows Server 2008 R2

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Article ID: 981357 - View products that this article applies to.
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SYMPTOMS

Consider the following scenario:
  • You have a computer that is running Windows Server 2008, Windows Vista, Windows 7 or Windows Server 2008 R2.
  • You use Microsoft iSCSI Initiator to manage persistent Internet SCSI (iSCSI) targets.
  • You frequently add, remove, or query the persistent iSCSI targets information.
In this scenario, the handle count of the system process increases constantly. After this issue persists for some time, the memory resource is exhausted. Then you experience one or more of the following issues:
  • Many services or applications stop working.
  • The whole computer stops responding.
Then, you must restart the computer to recover from this issue.

Note If you monitor the leaked handles information, you find that all handles are registry handles. Additionally, these handles are related to persistent targets.

CAUSE

The issue occurs because the iSCSI driver (Msiscsi.sys) does not close all registry handles after you query the persistent iSCSI targets information. This behavior causes a handles-leak in the System process.

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 one of the following operating systems installed on your computer:
  • Windows Vista Service Pack 1 (SP1)
  • Windows Vista Service Pack 2 (SP2)
  • Windows Server 2008
  • Windows Server 2008 Service Pack 2 (SP2)
  • Windows 7
  • Windows Server 2008 R2
For more information about how to obtain a Windows Vista service pack, click the following article number to view the article in the Microsoft Knowledge Base:
935791 How to obtain the latest Windows Vista service pack
For more information about how to obtain a Windows Server 2008 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
968849 How to obtain the latest service pack for Windows Server 2008

Registry information

To use the hotfix in this package, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
Windows Vista and Windows Server 2008 file information notes
Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.
    Collapse this tableExpand this table
    VersionProductSR_LevelService branch
    6.0.600 1 . 22xxxWindows Vista and Windows Server 2008SP1LDR
    6.0.600 2 . 22xxxWindows Vista and Windows Server 2008SP2LDR
  • Service Pack 1 is integrated into the release version of Windows Server 2008.
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 and for Windows Vista" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Iscsi.inf_locNot applicable83805-Mar-201000:24Not applicable
Iscsi.inf_locNot applicable85404-Mar-201019:51Not applicable
Iscsi.infNot applicable7,43604-Mar-201013:24Not applicable
Iscsilog.dll6.0.6001.2264816,38404-Mar-201016:03x86
Msiscsi.sys6.0.6001.22648182,16004-Mar-201018:35x86
Iscsi.infNot applicable7,43604-Mar-201013:19Not applicable
Iscsilog.dll6.0.6002.2235416,38404-Mar-201015:44x86
Msiscsi.sys6.0.6002.22354182,14404-Mar-201018:26x86
For all supported x64-based versions of Windows Server 2008 and of Windows Vista
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Iscsi.inf_locNot applicable83805-Mar-201001:03Not applicable
Iscsi.inf_locNot applicable85404-Mar-201020:26Not applicable
Iscsi.inf_locNot applicable85404-Mar-201020:26Not applicable
Iscsi.infNot applicable7,44404-Mar-201013:23Not applicable
Iscsilog.dll6.0.6001.2264816,38404-Mar-201016:27x64
Msiscsi.sys6.0.6001.22648217,48804-Mar-201018:59x64
Iscsi.infNot applicable7,44404-Mar-201013:20Not applicable
Iscsilog.dll6.0.6002.2235416,38404-Mar-201016:00x64
Msiscsi.sys6.0.6002.22354217,98404-Mar-201018:25x64
For all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Iscsi.inf_locNot applicable85804-Mar-201018:15Not applicable
Iscsi.infNot applicable7,44004-Mar-201013:22Not applicable
Iscsilog.dll6.0.6001.2264816,38404-Mar-201016:11IA-64
Msiscsi.sys6.0.6001.22648503,68804-Mar-201018:47IA-64
Iscsi.infNot applicable7,44004-Mar-201013:19Not applicable
Iscsilog.dll6.0.6002.2235416,38404-Mar-201015:57IA-64
Msiscsi.sys6.0.6002.22354503,68804-Mar-201018:20IA-64
Windows 7 and Windows Server 2008 R2 file information notes
Important Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.
  • The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 R2 and for Windows 7" section. MUM and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintain the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Msiscsi.sys6.1.7600.20820233,34419-Oct-201008:14x86
For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Msiscsi.sys6.1.7600.20820273,79219-Oct-201009:23x64
For all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Msiscsi.sys6.1.7600.20820680,32019-Oct-201007:54IA-64

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 about the iSCSI Target, visit the following Microsoft Tech Web sites:
How to manage the iSCSI Target


For more information about how to configure persistent logons to the target, click the following article number to view the article in the Microsoft Knowledge Base:
870964 File shares on iSCSI devices may not be re-created when you restart the computer
For more information about software update terminology, 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

Additional file information

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameUpdate.mum
File versionNot applicable
File size40,170
Date (UTC)05-Mar-2010
Time (UTC)05:52
PlatformNot applicable
File nameX86_iscsi.inf_31bf3856ad364e35_6.0.6001.22648_none_3d2a2e9d0cdd7e37.manifest
File versionNot applicable
File size2,250
Date (UTC)05-Mar-2010
Time (UTC)05:53
PlatformNot applicable
File nameX86_iscsi.inf_31bf3856ad364e35_6.0.6002.22354_none_3f01cf710a0f89f0.manifest
File versionNot applicable
File size2,250
Date (UTC)05-Mar-2010
Time (UTC)05:53
PlatformNot applicable
Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameAmd64_iscsi.inf_31bf3856ad364e35_6.0.6001.22648_none_9948ca20c53aef6d.manifest
File versionNot applicable
File size2,252
Date (UTC)05-Mar-2010
Time (UTC)05:53
PlatformNot applicable
File nameAmd64_iscsi.inf_31bf3856ad364e35_6.0.6002.22354_none_9b206af4c26cfb26.manifest
File versionNot applicable
File size2,252
Date (UTC)05-Mar-2010
Time (UTC)05:53
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size40,558
Date (UTC)05-Mar-2010
Time (UTC)05:52
PlatformNot applicable
Additional files for all supported IA-64-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameIa64_iscsi.inf_31bf3856ad364e35_6.0.6001.22648_none_3d2bd2930cdb8733.manifest
File versionNot applicable
File size2,251
Date (UTC)05-Mar-2010
Time (UTC)05:53
PlatformNot applicable
File nameIa64_iscsi.inf_31bf3856ad364e35_6.0.6002.22354_none_3f0373670a0d92ec.manifest
File versionNot applicable
File size2,251
Date (UTC)05-Mar-2010
Time (UTC)05:53
PlatformNot applicable
File nameUpdate.mum
File versionNot applicable
File size7,249
Date (UTC)05-Mar-2010
Time (UTC)05:52
PlatformNot applicable

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

Additional files for all supported x86-based versions of Windows 7
Collapse this tableExpand this table
File nameUpdate.mum
File versionNot Applicable
File size1,619
Date (UTC)19-Oct-2010
Time (UTC)11:00
PlatformNot Applicable
File nameX86_iscsi.inf_31bf3856ad364e35_6.1.7600.20820_none_3d5f9e506debb5ac.manifest
File versionNot Applicable
File size2,456
Date (UTC)19-Oct-2010
Time (UTC)11:03
PlatformNot Applicable
Additional files for all supported x64-based versions of Windows 7 and of Windows Server 2008 R2
Collapse this tableExpand this table
File nameAmd64_iscsi.inf_31bf3856ad364e35_6.1.7600.20820_none_997e39d4264926e2.manifest
File versionNot Applicable
File size2,460
Date (UTC)19-Oct-2010
Time (UTC)11:06
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size1,629
Date (UTC)19-Oct-2010
Time (UTC)11:00
PlatformNot Applicable
Additional files for all supported IA-64-based versions of Windows Server 2008 R2
Collapse this tableExpand this table
File nameIa64_iscsi.inf_31bf3856ad364e35_6.1.7600.20820_none_3d6142466de9bea8.manifest
File versionNot Applicable
File size2,458
Date (UTC)19-Oct-2010
Time (UTC)11:00
PlatformNot Applicable
File nameUpdate.mum
File versionNot Applicable
File size1,445
Date (UTC)19-Oct-2010
Time (UTC)11:00
PlatformNot Applicable

Properties

Article ID: 981357 - Last Review: October 6, 2011 - Revision: 3.0
APPLIES TO
  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Ultimate
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
  • Windows Vista Business 64-bit Edition
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows 7 Enterprise
  • Windows 7 Home Basic
  • Windows 7 Home Premium
  • Windows 7 Professional
  • Windows 7 Ultimate
  • Windows Server 2008 R2 Datacenter
  • Windows Server 2008 R2 Enterprise
  • Windows Server 2008 R2 for Itanium-Based Systems
  • Windows Server 2008 R2 Standard
Keywords: 
kbexpertiseadvanced kbfix kbautohotfix kbsurveynew kbqfe KB981357

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