[Session attribute disappearing between requests]
*sigh* Brown paper bag error: the original-request handler was
cleaning up the value before it could be read by the progress-request
handler, when the original request *does not* run a long time
(e.g. zero records to summarize). That's the wrong
Background: client request starts a long-running procedure which
eventually returns a calculated result. I want to provide a progress
meter so that the user knows that the request is still running. The
page where this happens periodically fires an AJAX request to sample
the progress of the proce
