Why Does Cross-Application Session Sharing Cause Web App Lockups During Large Data Uploads?

Web Application Session Locking During Cross-Application Data Transfers

Two IIS-hosted web applications, /HRMS and /TravelDesk, utilize AspState for shared session management. Session sharing functions correctly during navigation between applications. Problems occur, however, when users upload large datasets within /TravelDesk.

The /HRMS application becomes unresponsive while /TravelDesk processes the upload. This unresponsiveness stems from the SQL Server session lock imposed during /TravelDesk's data handling.

Resolution:

The recommended solution involves temporarily disabling the session during large data uploads. This can be implemented within the upload handler or page.

Disabling the session during data processing releases the SQL Server session lock, restoring responsiveness to the /HRMS application.

Further Reading:

• Alternative to ASP.Net's Session State

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