FIX: When you try to perform two-phase commit transactions over TCP/IP by using Host Integration Server 2004 Managed Provider for DB2, the transactions fail

When you access later versions of DB2 to perform two-phase commit (2PC) transactions over TCP/IP by using Microsoft Host Integration Server 2004 Managed Provider for DB2, a failure occurs and the transaction is rolled back. When you try to perform a 2PC transaction in SQL Query Analyzer, you receive the following error message:

Versions of IBM DB2 that support XA Manager return additional data that Host Integration Server 2004 Managed Provider for DB2 cannot process. Therefore, a protocol violation occurs and Microsoft Distributed Transaction Coordinator (MSDTC) aborts the transaction.

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. 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: 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.

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 tool in Control Panel.Note Because of file dependencies, the most recent hotfix that contains these files may also contain additional files.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Steps to reproduce the problem

1. Use the following settings to set up a linked server that is running Microsoft SQL Server:
   • Network = TCP/IP
   • Units of Work = DUW (Distributed Units of Work)
   • Connection Pooling = False
2. Start SQL Query Analyzer. Then, run a command such as the following.

   SELECT * from LINKDUW.DSNFD037.SAMPLE.TBLA

   Notice that the command succeeds.
3. Run the following series of commands that use 2PC.

   SET XACT_ABORT ON

   BEGIN DISTRIBUTED TRAN

   UPDATE LINKDUW.DSNFD037.SAMPLE.TBLA SET NAME='New Name' WHERE ID=1

   COMMIT TRAN

   SET XACT_ABORT OFF

   Notice that the series of commands fails. In SQL Query Analyzer, you receive the error message that is mentioned in the "Symptoms" section.

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.