FIX: Heap corruption may occur when IIS times out a web service that uses the OLE DB provider for DB2 to query an IBM DB2 database in a Host Integration Server environment


Consider the following scenario:
  • A web application makes a query call to an IBM DB2 database by using the Microsoft OLE DB Provider for DB2 that is included in Microsoft Host Integration Server.
  • The executionTimeout property in the Web.config web services file is set to a value. For example, the property is set to the default setting of 30 seconds.
  • Internet Information Services (IIS) issues a "thread abort" when the executionTimeout property is exceeded.

In this scenario, heap corruption may occur. Additionally, the call from the web application is not completed.


This problem may occur in certain timing situations. For example, it may occur when the managed provider switches from managed to unmanaged code to free up objects and an invalid value is returned to the managed code.

Note The exact scenario for this problem is difficult to reproduce.


Host Integration Server 2009

The hotfix that resolves this issue is included in cumulative update package 1 for Host Integration Server 2009.

For more information about how to obtain the cumulative update package, click the following article numbers to view the articles in the Microsoft Knowledge Base:
2587090 Cumulative update package 1 for Host Integration Server 2009

Host Integration Server 2010

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 website: 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.


You must have Microsoft Host Integration Server 2010 installed to apply this hotfix.

Restart information

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

Replacement information

This hotfix does not replace a previously released hotfix.

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.

For Microsoft Host Integration Server 2010, 32-bit Edition
File nameFile versionFile sizeDateTimePlatform
For Microsoft Host Integration Server 2010, 64-bit Edition
File nameFile versionFile sizeDateTimePlatform


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

More Information

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.

رقم الموضوع: 2600364 - آخر مراجعة: 22‏/09‏/2011 - المراجعة: 1