ASP.NET Session has expired (SSRS environment)

This post has been republished via RSS; it originally appeared at: IIS Support Blog articles.

If you are hosting SSRS environment on multiple IIS servers, you will need to use a common State Server or SQL Server to store session data. Please note that using In-Process mode or using State Server Mode in the server itself will cause session errors such as “ASP.NET Session has expired”. In order to avoid this issue:

In the web.config file:

• Set enableSessionState to True. Example:

• Make sure that Session State is not disabled in pages. If there is enableSessionState parameter in the Page directive, set it to True. Example:

• There should be stateConnectionString defined in the. IIS servers should point to a common server to store session information. Example:

• To set up a separate server as State Server, install .NET Framework and set the registry key below to “1”. ASP.NET State Service should be running.

References:

• State Server Mode with the sample configuration
• Planning for State Server
• Step-by-step instructions to use State Server