| I have not experienced this myself, but see http://stackoverflow.com/questions/2246384/multiprocessing-pool-hangs-when-there-is-a-exception-in-any-of-the-thread This appears to be another case of http://bugs.python.org/issue1692335 I also recently reported a similar problem at http://bugs.python.org/issue13751 Looking at the code for `NoOptionError` (see below) in 2.6 at least it would indeed be subject to the same problem. Perhaps some attention could be paid to resolving 1692335, which would presumably make this vexing problem go away? class NoOptionError(Error): """A requested option was not found.""" def __init__(self, option, section): Error.__init__(self, "No option %r in section: %r" % (option, section)) self.option = option self.section = section |