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Access violation occurs when you use a custom configuration section handler in an ASP.NET application that is under stress
This article was previously published under Q307513
This article refers to the following Microsoft .NET
Framework Class Library namespaces:
If an ASP.NET application uses a custom configuration
section handler, a first chance exception of type access violation may occur in the Aspnet_wp.exe
process
(or W3wp.exe process, foran application that runs on Microsoft Internet Information Services [IIS] 6.0)
when the ASP.NET application is under stress.
This problem can occur when multiple threads are accessing
the same configuration object simultaneously if your implementation of the
IConfigurationSectionHandler interface is not thread-safe and stateless or if the object that
the
Create method returns is not thread-safe and immutable.
When you create a custom ASP.NET configuration section
handler, use the following guidelines when you implement the
IConfigurationSectionHandler interface:
- Instances of your class that implement the IConfigurationSectionHandler interface must be thread-safe and stateless.
- The object that the IConfigurationSectionHandler.Create method returns must be thread-safe and immutable.
- Do not modify the parent argument to the IConfigurationSectionHandler.Create method.
This behavior is by design.
Instances of
IConfigurationSectionHandler must be thread-safe and stateless. You must be able to call the
IConfigurationSectionHandler.Create method from multiple threads simultaneously.
Furthermore, the configuration object that
IConfigurationSectionHandler.Create generates must be thread-safe and immutable. Because the
configuration system caches the configuration objects, it is important that you
not modify the "parent" argument to
IConfigurationSectionHandler.Create. For example, if the return value of
IConfigurationSectionHandler.Create is only a small modification of the "parent," you must modify a
clone of the "parent," not the original.
For more information about ASP.NET
configuration, click the following article numbers to view the articles in the Microsoft Knowledge Base:
307626
(http://kbalertz.com/Feedback.aspx?kbNumber=307626/
)
ASP.NET configuration overview
309045
(http://kbalertz.com/Feedback.aspx?kbNumber=309045/
)
How to create a custom ASP.NET configuration section handler in Visual C# .NET
Article ID: 307513 - Last Review: July 7, 2006 - Revision: 3.3
APPLIES TO
- Microsoft ASP.NET 1.1
- Microsoft ASP.NET 1.0
- Microsoft .NET Framework 1.1
| kbconfig kbhttphandlers kbhttpruntime kbprb kbreadme KB307513 |
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