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Session State Is Lost in Web Farm If You Use SqlServer or StateServer Session Mode

Jawahar Ganesh S's avatar
Jawahar Ganesh S
Icon for Microsoft rankMicrosoft
Feb 15, 2019
One of the most common issues that users face when hosting their application in a webfarm is “unexpected loss of session state”. We face these issues when we store the session information inproc, esp...
Updated Sep 06, 2021
Version 2.0
Marcel8964's avatar
Marcel8964
Copper Contributor
Oct 29, 2023

Both "Site ID" of servers in server farm, "Application Path" of the application, and "Validation Key", "Decryption Key" of the application should be the same across different servers in server farm.

 

Site ID is the number assiged by IIS to a site, viewable from IIS -> [Host Name] -> Sites -> the "ID" column on the main pane ("Sites"). e.g. "Default Web Site" always be assigned with ID 1.  The site id is editable in the "Advance Setting" of the site.

 

Application Path is the path name under the site, viewable from IIS -> [Host Name] -> Sites -> [Name of Site, e.g. "Default Web Site"] -> [Application Path, e.g. the name of your application.]

 

"Validation Key", "Decription Key" viewable from IIS -> [Host Name] -> Sites -> [Name of Site, e.g. "Default Web Site"] -> [Application Path, e.g. the name of your application.] -> Machine Key icon on the main pane.  Need to generate in one of the server, and paste to other servers.