Ever wonder how the server handles changes to the Global.asa file while the application is running? When you save changes to the Global.asa file, the server finishes processing all of the current application requests before it recompiles the Global.asa file. During that time, the server refuses additional requests and returns an error message stating that the request cannot be processed while the application is being restarted.
After all of the current user requests have been processed, the server deletes all active sessions, calling the Session_OnEnd event for each session it deletes, closes the application, and calls the Application_OnEnd event. The Global.asa file is then recompiled. Subsequent user requests will start the application and create new sessions, and trigger the Application_OnStart and Session_OnStart events.