BSP session not dying when browser window closes

Question

Hi,
I am having a small problem with the bsp session. I shall explain the prb with an example.
Lets say i have a bsp application BSP1. I open the application from the Favorites tab in the SAPGUi.
Initially, i have another browser window open containing google.com(this is imp that i have another browser open all the time containing anything). I now start BSP1, then i close the window by hitting the close button of the browser, as a result the controller sends a exit view back to the frontend which never gets displayed. now i start BSP1 again from SAPGUi, and the browser instead of showing me the logon screen and the start page goes to the exit page of the application. In other words to the last URL that i visited last time in the application. Somehow when the window is closed, the session on the applicaiton server is not dying. This only happens if i have any other browser open all the time containing any thing.
If i do not have any other browser open, and then i follow the above sequence of events,everything runs smoothly. Also, in the previous case, if i close the google window also and start the application again, everything runs smoothly. In IE settings , in Advanced tab there is a setting for REUSE EXISTING WINDOWS FOR LAUNCHING SHORTCUTS. If i set this option, everything runs smoothly, even if i have a Google(whatever) window open all the time. If i do not set this option, i run into the problem as in the first case. Also, if instead of opening the application through the SAPGui i open another browser from the taskbar and type in the URL , everything runs smoothly inspite of another google window being opened all the time.
Also this problem is evident in systems with BASIS 640/level 10 and BASIS 620/level 19. It might be present in other versions also but i am working on these two systems with these versions. This problem does not pop up on BASIS 700.
If on exit, within the controller, i reset the keep_context attribute of RUNTIME  object, everything runs smoothly.
could you please guide me as to what can be the problem here and how it can be solved. It is important. Any kind of help and guidance would be highly appreciated.
Looking forward to your response,
Thanks and best regards,
Ghufran

Answer 1

The very first important aspect to understand is that CANCEL kills the session long before the request reaches the ABAP stack. So what ever you want to do, this is not the way to go.
From reading your first post in this thread through, I have the impression that you might have some confusion between stateful versus authentication. No, I it is not the problem/solution, but just that your very long descriptions without using consistant terminology makes it difficult to understand where we are going.
Thus, I would recommending read this article for background information:<a href="/people/mark.finnern/blog/2003/09/24/bsp-in-depth-confusion-between-stateless-stateful-and-authentication">BSP In-Depth: Confusion between Stateless, Stateful and Authentication</a>.
Next, you CAN NOT "redirect it to the browser on the onbeforeunload() event". Well, at least I never have never succeeded.
Once the closed button is hit, you have not many options. One idea is a window.open, see system application for examples. The other is the image loading trick that Thomas describes in his weblog. Both ideas will actually solve your problems (once you really understand what is happening). This is unfortunately not always perfectly easy.
brian