Flex Mobile, URLLoader and Sessions

I have created a Flex Mobile Project that I've been testing so far on a Motorola Xoom and uses the URLLoader object to query some JSP pages and return the output. These JSP pages require user authentication which depend on sessions.
If my URLLoader requests are made sequentially (the second request is not made until the first is completed) session information functions normally. If multiple URLLoader requests are made at the same time there is a chance that one or more of the request's session information will fail. I've used a packet sniffer and found that the "Cookie: JSESSION=..." header value is not being set or sent to the server.
I've actually been able to solve this problem by fetching my session ID when I login, storing it locally and setting the "Cookie: JSESSION=..." value manually in the header of all my URLLoader requests. Most of the time the browser will overwrite this value that I've set with the session ID that it has, and that's fine. But in the case where it doesn't set this value then my manually set value is passed to the server and it is able to find the appropriate session.
The solution I've come up with seems to work so far, but I was still wondering if anybody knows what's causing this or knows a better solution?

That sounds like everything's working the way it should. Until the "first" request is authenticated successfully and the response comes back to the browser/device, your app doesn't have session credentials. Sending multiple simultaneous unauthenticated requests will thus all need to authenticate individually -- and making matters worse, may create multiple sessions on the server, so as they come back your session info (as represented by your JSESSION ids) will rapidly run through all the new sessions until settling on the last one.
I would suggest changing your application flow to let your first request go by itself first and not submit any other requests until that (authenticated) response is received.
-- Tom
Flex SDK engineer

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