Symptoms

When an MSDTC transaction runs on a computer that is running Windows 7 or Windows Server 2008 R2, the Distributed Transaction Coordinator service (Msdtc.exe) may crash if slow network performance occurs.

Additionally, the following events are logged:

Cause

This issue occurs because MSDTC logs a warning.

When a connection time-out is detected, MSDTC logs a warning if slow network performance occurs. However, an object dereferences a null pointer when the session is cleaned up. Therefore, the issue that is mentioned in the "Symptoms" section occurs.

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=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)

For more information about how to obtain a Windows 7 or Windows Server 2008 R2 service pack, click the following article number to view the article in the Microsoft Knowledge Base:

976932 Information about Service Pack 1 for Windows 7 and for Windows Server 2008 R2

Registry information

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

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

File information

The global 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 7 and Windows Server 2008 R2 file information notes


  • 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

File name

File version

File size

Date

Time

Platform

Mtxclu.dll

2001.12.8530.21010

322,048

16-Jul-2011

04:26

x86

Mtxclu.dll

2001.12.8531.21772

323,584

16-Jul-2011

04:55

x86

Msdtcprx.dll

2001.12.8530.21010

579,584

16-Jul-2011

04:25

x86

Xolehlp.dll

2001.12.8530.21010

47,616

16-Jul-2011

04:29

x86

Msdtcprx.dll

2001.12.8531.21772

580,608

16-Jul-2011

04:55

x86

Xolehlp.dll

2001.12.8531.21772

48,128

16-Jul-2011

04:59

x86

Msdtctm.dll

2001.12.8530.21010

1,068,032

16-Jul-2011

04:25

x86

Msdtctm.dll

2001.12.8531.21772

1,069,056

16-Jul-2011

04:55

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

Mtxclu.dll

2001.12.8530.21010

374,272

16-Jul-2011

05:22

x64

Mtxclu.dll

2001.12.8531.21772

375,808

16-Jul-2011

05:29

x64

Msdtcprx.dll

2001.12.8530.21010

746,496

16-Jul-2011

05:21

x64

Xolehlp.dll

2001.12.8530.21010

59,392

16-Jul-2011

05:26

x64

Msdtcprx.dll

2001.12.8531.21772

748,032

16-Jul-2011

05:28

x64

Xolehlp.dll

2001.12.8531.21772

59,392

16-Jul-2011

05:33

x64

Msdtctm.dll

2001.12.8530.21010

1,510,912

16-Jul-2011

05:21

x64

Msdtctm.dll

2001.12.8531.21772

1,511,936

16-Jul-2011

05:28

x64

Msdtcprx.dll

2001.12.8530.21010

579,584

16-Jul-2011

04:25

x86

Xolehlp.dll

2001.12.8530.21010

47,616

16-Jul-2011

04:29

x86

Msdtcprx.dll

2001.12.8531.21772

580,608

16-Jul-2011

04:55

x86

Xolehlp.dll

2001.12.8531.21772

48,128

16-Jul-2011

04:59

x86

Mtxclu.dll

2001.12.8530.21010

322,048

16-Jul-2011

04:26

x86

Mtxclu.dll

2001.12.8531.21772

323,584

16-Jul-2011

04:55

x86

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

File name

File version

File size

Date

Time

Platform

Mtxclu.dll

2001.12.8530.21010

594,944

16-Jul-2011

04:03

IA-64

Mtxclu.dll

2001.12.8531.21772

596,480

16-Jul-2011

04:15

IA-64

Msdtcprx.dll

2001.12.8530.21010

1,600,000

16-Jul-2011

04:03

IA-64

Xolehlp.dll

2001.12.8530.21010

116,736

16-Jul-2011

04:06

IA-64

Msdtcprx.dll

2001.12.8531.21772

1,601,536

16-Jul-2011

04:14

IA-64

Xolehlp.dll

2001.12.8531.21772

116,736

16-Jul-2011

04:19

IA-64

Msdtctm.dll

2001.12.8530.21010

2,867,712

16-Jul-2011

04:03

IA-64

Msdtctm.dll

2001.12.8531.21772

2,868,736

16-Jul-2011

04:14

IA-64

Msdtcprx.dll

2001.12.8530.21010

579,584

16-Jul-2011

04:25

x86

Xolehlp.dll

2001.12.8530.21010

47,616

16-Jul-2011

04:29

x86

Msdtcprx.dll

2001.12.8531.21772

580,608

16-Jul-2011

04:55

x86

Xolehlp.dll

2001.12.8531.21772

48,128

16-Jul-2011

04:59

x86

Mtxclu.dll

2001.12.8530.21010

322,048

16-Jul-2011

04:26

x86

Mtxclu.dll

2001.12.8531.21772

323,584

16-Jul-2011

04:55

x86

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 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 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

2,637

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

X86_1337173abcc10d3d3e0dd4eaf5c912c0_31bf3856ad364e35_6.1.7601.21772_none_bbf7c21c7f7ec21a.manifest

File version

Not applicable

File size

711

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

X86_2c7d93a62606deb833aaa1a7d4b4d763_31bf3856ad364e35_6.1.7601.21772_none_ebb768d20ccf2119.manifest

File version

Not applicable

File size

702

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

X86_5a7de59fc9940b8433a0274fa4e8153e_31bf3856ad364e35_6.1.7601.21772_none_e795cb27c67270f8.manifest

File version

Not applicable

File size

706

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

X86_6f8cbfb9d47330cf0fc999d3d56bd761_31bf3856ad364e35_6.1.7600.21010_none_0aa440393393c331.manifest

File version

Not applicable

File size

711

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

X86_91320beff5bad7e5d570569ccd554822_31bf3856ad364e35_6.1.7600.21010_none_69b064c8d9a4b1be.manifest

File version

Not applicable

File size

706

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

X86_d4da8cefe4dc6e54a74d5009c2b826a9_31bf3856ad364e35_6.1.7600.21010_none_ca6923725282ec8d.manifest

File version

Not applicable

File size

702

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

X86_microsoft-windows-c..dtc-runtime-cluster_31bf3856ad364e35_6.1.7600.21010_none_972ed1c306ef59e9.manifest

File version

Not applicable

File size

2,226

Date (UTC)

16-Jul-2011

Time (UTC)

04:54

Platform

Not applicable

File name

X86_microsoft-windows-c..dtc-runtime-cluster_31bf3856ad364e35_6.1.7601.21772_none_98d677b304446ce7.manifest

File version

Not applicable

File size

2,226

Date (UTC)

16-Jul-2011

Time (UTC)

05:26

Platform

Not applicable

File name

X86_microsoft-windows-com-dtc-client_31bf3856ad364e35_6.1.7600.21010_none_4d997047338ae09d.manifest

File version

Not applicable

File size

6,771

Date (UTC)

16-Jul-2011

Time (UTC)

05:00

Platform

Not applicable

File name

X86_microsoft-windows-com-dtc-client_31bf3856ad364e35_6.1.7601.21772_none_4f41163730dff39b.manifest

File version

Not applicable

File size

6,771

Date (UTC)

16-Jul-2011

Time (UTC)

05:29

Platform

Not applicable

File name

X86_microsoft-windows-com-dtc-runtime-tm_31bf3856ad364e35_6.1.7600.21010_none_9a3f10b294fcfa78.manifest

File version

Not applicable

File size

31,492

Date (UTC)

16-Jul-2011

Time (UTC)

05:01

Platform

Not applicable

File name

X86_microsoft-windows-com-dtc-runtime-tm_31bf3856ad364e35_6.1.7601.21772_none_9be6b6a292520d76.manifest

File version

Not applicable

File size

31,492

Date (UTC)

16-Jul-2011

Time (UTC)

05:30

Platform

Not applicable

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

File name

Amd64_1337173abcc10d3d3e0dd4eaf5c912c0_31bf3856ad364e35_6.1.7601.21772_none_18165da037dc3350.manifest

File version

Not applicable

File size

713

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_370876568beefacc0cbdae1444694588_31bf3856ad364e35_6.1.7601.21772_none_5f983e1cb50cf4c2.manifest

File version

Not applicable

File size

706

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_49c48d37ab9828c491c2eb17266e3c1a_31bf3856ad364e35_6.1.7601.21772_none_a154b28bb04b5a27.manifest

File version

Not applicable

File size

710

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_549d13b61e8344f9735f83ea0e9f1c74_31bf3856ad364e35_6.1.7601.21772_none_a84eca4e9a90c46c.manifest

File version

Not applicable

File size

1,054

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_620f53a8513f96b836621173284be86f_31bf3856ad364e35_6.1.7601.21772_none_68bd6886397268b0.manifest

File version

Not applicable

File size

715

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_6f8cbfb9d47330cf0fc999d3d56bd761_31bf3856ad364e35_6.1.7600.21010_none_66c2dbbcebf13467.manifest

File version

Not applicable

File size

713

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_75a5d9a77059d0064a146f0a88abd6e9_31bf3856ad364e35_6.1.7600.21010_none_1847fc66c959d1eb.manifest

File version

Not applicable

File size

710

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_94217356f76b450e8d6f3ffe5279462a_31bf3856ad364e35_6.1.7600.21010_none_8cbd4426dba000cb.manifest

File version

Not applicable

File size

715

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_a2669f67e01c0a011b3fd153b8c93777_31bf3856ad364e35_6.1.7601.21772_none_5cb2240f92f78436.manifest

File version

Not applicable

File size

706

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_b3b1025b53a33c56f0217dcd78e2139b_31bf3856ad364e35_6.1.7600.21010_none_caf625eff0e847b1.manifest

File version

Not applicable

File size

706

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_b4f779600ed76e94550af7bf2364c2ca_31bf3856ad364e35_6.1.7600.21010_none_18adb37e5a6660fc.manifest

File version

Not applicable

File size

706

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_be4d54ff046b20eb28b2432009c106b9_31bf3856ad364e35_6.1.7600.21010_none_bf02c3764415d833.manifest

File version

Not applicable

File size

1,070

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_cdd37455cd076e70c84cd13251ee03c6_31bf3856ad364e35_6.1.7601.21772_none_ebeea126805a06c4.manifest

File version

Not applicable

File size

1,070

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_e7bff12affec22549dde2eef213e72b0_31bf3856ad364e35_6.1.7600.21010_none_341e0f8cdd4e2a44.manifest

File version

Not applicable

File size

1,054

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Amd64_microsoft-windows-c..dtc-runtime-cluster_31bf3856ad364e35_6.1.7600.21010_none_f34d6d46bf4ccb1f.manifest

File version

Not applicable

File size

2,228

Date (UTC)

16-Jul-2011

Time (UTC)

05:56

Platform

Not applicable

File name

Amd64_microsoft-windows-c..dtc-runtime-cluster_31bf3856ad364e35_6.1.7601.21772_none_f4f51336bca1de1d.manifest

File version

Not applicable

File size

2,228

Date (UTC)

16-Jul-2011

Time (UTC)

06:16

Platform

Not applicable

File name

Amd64_microsoft-windows-com-dtc-client_31bf3856ad364e35_6.1.7600.21010_none_a9b80bcaebe851d3.manifest

File version

Not applicable

File size

6,773

Date (UTC)

16-Jul-2011

Time (UTC)

05:59

Platform

Not applicable

File name

Amd64_microsoft-windows-com-dtc-client_31bf3856ad364e35_6.1.7601.21772_none_ab5fb1bae93d64d1.manifest

File version

Not applicable

File size

6,773

Date (UTC)

16-Jul-2011

Time (UTC)

06:22

Platform

Not applicable

File name

Amd64_microsoft-windows-com-dtc-runtime-tm_31bf3856ad364e35_6.1.7600.21010_none_f65dac364d5a6bae.manifest

File version

Not applicable

File size

31,494

Date (UTC)

16-Jul-2011

Time (UTC)

06:00

Platform

Not applicable

File name

Amd64_microsoft-windows-com-dtc-runtime-tm_31bf3856ad364e35_6.1.7601.21772_none_f80552264aaf7eac.manifest

File version

Not applicable

File size

31,494

Date (UTC)

16-Jul-2011

Time (UTC)

06:24

Platform

Not applicable

File name

Update.mum

File version

Not applicable

File size

3,923

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Wow64_microsoft-windows-com-dtc-client_31bf3856ad364e35_6.1.7600.21010_none_b40cb61d204913ce.manifest

File version

Not applicable

File size

6,467

Date (UTC)

16-Jul-2011

Time (UTC)

04:46

Platform

Not applicable

File name

Wow64_microsoft-windows-com-dtc-client_31bf3856ad364e35_6.1.7601.21772_none_b5b45c0d1d9e26cc.manifest

File version

Not applicable

File size

6,467

Date (UTC)

16-Jul-2011

Time (UTC)

05:16

Platform

Not applicable

File name

X86_microsoft-windows-c..dtc-runtime-cluster_31bf3856ad364e35_6.1.7600.21010_none_972ed1c306ef59e9.manifest

File version

Not applicable

File size

2,226

Date (UTC)

16-Jul-2011

Time (UTC)

04:54

Platform

Not applicable

File name

X86_microsoft-windows-c..dtc-runtime-cluster_31bf3856ad364e35_6.1.7601.21772_none_98d677b304446ce7.manifest

File version

Not applicable

File size

2,226

Date (UTC)

16-Jul-2011

Time (UTC)

05:26

Platform

Not applicable

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

File name

Ia64_10713f6914f77f4f906b7883406d4d94_31bf3856ad364e35_6.1.7600.21010_none_da1f2a72627cdf71.manifest

File version

Not applicable

File size

713

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Ia64_1337173abcc10d3d3e0dd4eaf5c912c0_31bf3856ad364e35_6.1.7601.21772_none_bbf966127f7ccb16.manifest

File version

Not applicable

File size

712

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Ia64_18db9395533362f8ba3c76efbfe07dad_31bf3856ad364e35_6.1.7600.21010_none_2f7e22dae1e38a98.manifest

File version

Not applicable

File size

708

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Ia64_364710c3638611bfd0901cf1449549d6_31bf3856ad364e35_6.1.7601.21772_none_ba9db576b7e67f5a.manifest

File version

Not applicable

File size

713

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Ia64_370876568beefacc0cbdae1444694588_31bf3856ad364e35_6.1.7601.21772_none_037b468efcad8c88.manifest

File version

Not applicable

File size

705

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Ia64_394f909ba008d9daa77c6a72cc8e1bd3_31bf3856ad364e35_6.1.7601.21772_none_0419e39e5f69424d.manifest

File version

Not applicable

File size

704

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Ia64_6f8cbfb9d47330cf0fc999d3d56bd761_31bf3856ad364e35_6.1.7600.21010_none_0aa5e42f3391cc2d.manifest

File version

Not applicable

File size

712

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Ia64_8336090f0f7ab5f62414f461aeb2253e_31bf3856ad364e35_6.1.7601.21772_none_a7253383882f788c.manifest

File version

Not applicable

File size

708

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Ia64_a2e010171955b4ecb56b67a4aaca9555_31bf3856ad364e35_6.1.7600.21010_none_1cde1b1ddf10b8e1.manifest

File version

Not applicable

File size

704

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Ia64_b4f779600ed76e94550af7bf2364c2ca_31bf3856ad364e35_6.1.7600.21010_none_bc90bbf0a206f8c2.manifest

File version

Not applicable

File size

705

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

Platform

Not applicable

File name

Ia64_microsoft-windows-c..dtc-runtime-cluster_31bf3856ad364e35_6.1.7600.21010_none_973075b906ed62e5.manifest

File version

Not applicable

File size

2,227

Date (UTC)

16-Jul-2011

Time (UTC)

05:46

Platform

Not applicable

File name

Ia64_microsoft-windows-c..dtc-runtime-cluster_31bf3856ad364e35_6.1.7601.21772_none_98d81ba9044275e3.manifest

File version

Not applicable

File size

2,227

Date (UTC)

16-Jul-2011

Time (UTC)

06:12

Platform

Not applicable

File name

Ia64_microsoft-windows-com-dtc-client_31bf3856ad364e35_6.1.7600.21010_none_4d9b143d3388e999.manifest

File version

Not applicable

File size

6,772

Date (UTC)

16-Jul-2011

Time (UTC)

05:48

Platform

Not applicable

File name

Ia64_microsoft-windows-com-dtc-client_31bf3856ad364e35_6.1.7601.21772_none_4f42ba2d30ddfc97.manifest

File version

Not applicable

File size

6,772

Date (UTC)

16-Jul-2011

Time (UTC)

06:14

Platform

Not applicable

File name

Ia64_microsoft-windows-com-dtc-runtime-tm_31bf3856ad364e35_6.1.7600.21010_none_9a40b4a894fb0374.manifest

File version

Not applicable

File size

31,493

Date (UTC)

16-Jul-2011

Time (UTC)

05:49

Platform

Not applicable

File name

Ia64_microsoft-windows-com-dtc-runtime-tm_31bf3856ad364e35_6.1.7601.21772_none_9be85a9892501672.manifest

File version

Not applicable

File size

31,493

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16-Jul-2011

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2,170

Date (UTC)

18-Jul-2011

Time (UTC)

20:18

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Not applicable

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Wow64_microsoft-windows-com-dtc-client_31bf3856ad364e35_6.1.7600.21010_none_b40cb61d204913ce.manifest

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6,467

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16-Jul-2011

Time (UTC)

04:46

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Wow64_microsoft-windows-com-dtc-client_31bf3856ad364e35_6.1.7601.21772_none_b5b45c0d1d9e26cc.manifest

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6,467

Date (UTC)

16-Jul-2011

Time (UTC)

05:16

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File name

X86_microsoft-windows-c..dtc-runtime-cluster_31bf3856ad364e35_6.1.7600.21010_none_972ed1c306ef59e9.manifest

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2,226

Date (UTC)

16-Jul-2011

Time (UTC)

04:54

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Not applicable

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X86_microsoft-windows-c..dtc-runtime-cluster_31bf3856ad364e35_6.1.7601.21772_none_98d677b304446ce7.manifest

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File size

2,226

Date (UTC)

16-Jul-2011

Time (UTC)

05:26

Platform

Not applicable

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