[Twisted-Python] intermittent traceback using adbapi with pyPgSQL

[Itamar Shtull-Trauring]

It sounds like you have a database command running in the threadpool
after the reactor has already been shut down. Which suggests you just
want to make sure reactor.stop() is called after you're certain there
are no more database calls running (and you mustn't call reactor.stop()
in a thread of course - reactor.callFromThread(reactor.stop) if you want
to).