Article ID: 324772 - View products that this article applies to.
This article was previously published under Q324772
Session data for ASP.NET Web applications appears to be lost at random intervals for the InProc session state mode.
Session state data is lost if the AppDomain or the Aspnet_wp.exe process (or the W3wp.exe process, for applications that run on Microsoft Internet Information Services [IIS] 6.0) is recycled. Generally, the AppDomain is restarted based on several factors:
To work around this problem, you can use StateServer or SqlServer session state mode. ASP.NET provides these other approaches for storing session state data. In the StateServer and SqlServer modes, your session state is not stored in the AppDomain of the Web application.
Note It is important to understand the behavior and the issues that are associated with each session state mode when you decide which mode is appropriate for your requirements. For more information, see the "References" section of this article.
For more information about ASP.NET session state management and other related topics, visit the following Microsoft Web site:
Session StateFor additional information, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/307598/EN-US/ )INFO: ASP.NET State Management Overview