Very strange. I am not using any custom C extensions... In the last two days, it has been under larger load, and it has not crashed. I will update to Python 2.6 soon.
By the way, are there any gotchas in updating from Twisted-2.5 (custom patched for epoll bug)/Python 2.4 to Twisted 8.2/Python 2.6? It's a production server, so sometimes testing under fake limited load does not reveal everything. > -----Original Message----- > From: twisted-python-boun...@twistedmatrix.com [mailto:twisted-python- > boun...@twistedmatrix.com] On Behalf Of Christopher Armstrong > Sent: Sunday, March 22, 2009 8:10 AM > To: Twisted general discussion > Subject: Re: [Twisted-Python] strange server crash > > On Sun, Mar 22, 2009 at 10:32 AM, Itamar Shtull-Trauring > <ita...@itamarst.org> wrote: > > On Sat, 2009-03-21 at 20:02 -0700, Alec Matusis wrote: > > > >> File "/nail/live/im/myserv/service.py", line 1199, in > logout > >> > >> if self.nick in session.sellers: > >> > >> exceptions.AttributeError: WLResultSet instance has no > >> attribute 'sellers' > >> > >> > >> > >> This last error repeated about 1000 times for different clients, > after > >> which the segfault occurred. > >> > >> The problem is, that “session” is an instance of a Session class > that > >> is defined in the code, it is NEITHER a Deferred NOR an instance of > >> WLResultSet class- these are completely different classes, and > there’s > >> no possible way in the code for variable session to become an > instance > >> of Deferred. > > > > I've seen this happen - once. My guess then was memory corruption of > > some sort (somewhere in the C level). If you have any custom C > > extensions you might want to try valgrind. > > I'd like to offer a slightly stronger suggestion that this segfault is > not the fault of any pure Python code (such as Twisted), but rather > some C extension that you're using, or perhaps a bug in the Python > runtime itself. The weird attribute errors for the wrong classes are > probably caused by memory corruption leading up to the segfault. > > > -- > Christopher Armstrong > http://radix.twistedmatrix.com/ > http://planet-if.com/ > http://canonical.com/ > > _______________________________________________ > Twisted-Python mailing list > Twisted-Python@twistedmatrix.com > http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
