ah, seems to be OK using python 2.5 and psycopg2.0.6, so, i guess thats fixed somehow....
On Dec 4, 2007, at 5:59 PM, Michael Bayer wrote: > > > On Dec 4, 2007, at 5:39 PM, David Bonner wrote: > >> >> >> yeah, the more i think about it, the more i realize this is an error >> when the dbapi connection is created, it's not a disconnect >> condition. the original error message is "No route to host", which >> I'm pretty sure is EHOSTUNREACH, which you get on a socket connect, >> not on a send. which means that yep, this is likely an async >> problem...the connection seems to be fine when you create it, but >> when >> you use it, it throws the connection error. > > oh it was much weirder than that. we already do detect the > "disconnect" on usage, so thats not an issue. the issue was > literally: > > try: > cursor.execute(some sql) > except: > detect_disconnect_and_invalidate() > do_something() > do_something_else() > > the cursor.execute would *not* raise an error. then, the program > fails, and the stack trace would say: > > OperationalError: <disconnect message> at do_something_else() line 52 > > meaning, the stack trace originated from an *arbitrary spot* in the > application ! you could actually control it like this: > > try: > cursor.execute(some sql) > time.sleep(5) > except: > detect_disconnect_and_invalidate() > do_something() > do_something_else() > > the time.sleep() would change the point of exception to be within the > try/except block ! the ticket is here: > http://www.initd.org/tracker/psycopg/ticket/183 > and the second email in the thread has the test script. federico > sort of thought it was a bug although i didnt follow his reasoning, > but the ticket seems pretty dead. > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
