Guido van Rossum added the comment:
The second error is easy to explain and fix: it's a race condition between the
OS thread used to call getaddrinfo() and the main thread. The method
_write_to_self() in selector_events.py is hopelessly naive. It should probably
become something like this:
def _write_to_self(self):
csock = self._csock
if csock is not None:
try:
self._csock.send(b'x')
except OSError:
pass
It is possible that the main thread closes csock at any time, and calling
send() on a closed socket will raise OSError with errno=9 (EBADF). Fortunately
this is because close() sets the fd to -1; so there is no worry about reuse of
the fd.
I will investigate the first traceback next.
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue21447>
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