You are awesome Niphlod. I restructured the process a bit so that page running the process does not have a form and just call session.forget(response) before starting it and it works great now. I can run it multiple times in the same browser and they all return the correct values independently when completed.
Thanks! On Sunday, September 21, 2014 4:03:27 PM UTC-5, Niphlod wrote: > > > > On Sunday, September 21, 2014 4:05:02 PM UTC+2, pn wrote: >> >> Did you test in a production environment (example behind an apache/other >> server calling web2py via wsgi as described in the deployment recipes >> chapter) or just using the built-in web2py server on your dev machine? >> >> The difference is that apache will certainly be able to handle multiple >> simultaneous requests, even long running ones until it runs out of >> allocated resources. Not sure if the built-in rocket server can do that or >> if it only handles one request at a time. >> > no, no, no, no. Never spawn external processes from a web request for the > following reasons: > - every serious webserver has something called "timeout" that reaps > processes and threads that are stale for a while. Usually the limit is 60 > seconds. Be aware that every "good-behaving" request should return in less > than half a second. > - managing external processes within a web app is a PITA > > @douglas: what you're experiencing comes from the fact that the default > session storage is serial, not parallel. that's because if you do something > like > > def testpage(): > session.somevar += 1 > .... > return dict() > > there could be race conditions among several "parallel" requests. The way > to turn this behaviour "off" is to avoid using session (make sure you don't > have forms in the page, because they require a sesson to be there) and use > session.forget(). You can read about it on the book. > > Anyway, if you need *n* parallel jobs to run, the best thing is to use > the Scheduler with *n* active processes, and leave the webserver just > queuing and reading the results (the simplest thing would be to poll > periodically for results) > -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
