Hi all, any news on this one? I have the exact same problem and have not found any solution to it. I have tried playing with session- and application timeouts, but without any luck. The funny thing is, that it occurs every day for my users, but I have never been able to reproduce it myself.
It seems that it would be related to some timeout, as the exceptions in my case always seem to occur in the afternoon. I have tried combinations of timeouts and ajax-requests and "standard" requests, but nothing.
I wonder under what circumstances all this happens? BKBK's answers seems weird. If the credentials are null/empty, then surely CF should run through the cflogin-block, not throw an exception??? I mean, the first request is always empty/null, I guess, but that's not the request generating the error.
If the user is logged in, cflogin should be skipped, otherwise cflogin should be run. I cannot see where and why an exception would be thrown.
I'm throwing every possible detail in onError(), to no avail.
My CF10 is running behind Apache, but I doubt that has any part in the problem.