Assume that you try to run a Web test in Microsoft Visual Studio 2010 or in Microsoft Test Manager 2010. However, the test controller (Qtcontroller.exe) crashes with an OutOfMemoryException exception or an unhandled exception if the test result file is large. Specifically, this issue occurs when the test results (.webtestresults) file is 1.5 gigabytes (GB) or larger.
Note Additionally, when the test controller crashes with an unhandled exception, you receive the following error message:
(QTController.exe, PID <n>, Thread <n>) TcmRunner: Unhandled exception for run : Internal Error! Failed to acquire a ReaderLock
This issue occurs because the Web test runs multiple iterations, and then produces a large result file. This behavior may consume a large amount of memory. However, Qtcontroller.exe is a 32-bit process.
Note The memory space of 32-bit processes is limited to 2 GB.
After you apply the hotfix, Qtcontroller.exe runs as a 64-bit process in x64-based operating systems.
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft website:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
To apply this hotfix, you must have Visual Studio 2010 Service Pack 1 (SP1) installed.
You may have to restart the computer after you apply this hotfix if the affected files are being used. We recommend that you exit Visual Studio 2010 before you apply this hotfix.
The global 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.