New submission from Michael Ballantyne:
from multiprocessing/connection.py:
while 1:
try:
s.connect(address)
except socket.error, e:
if e.args[0] != errno.ECONNREFUSED or _check_timeout(t):
debug('failed to connect to address %s', address)
raise
time.sleep(0.01)
else:
break
else:
raise
According to the POSIX spec http://pubs.opengroup.org/onlinepubs/9699919799/
"If connect() fails, the state of the socket is unspecified. Conforming
applications should close the file descriptor and create a new socket before
attempting to reconnect."
On Mac OS X and other BSDs (but not Linux), attempting to connect() again
throws EINVAL. As a result, the multiprocessing.connection.Client does not
successfully retry, and instead throws
socket.error: [Errno 22] Invalid argument
after the first refused connection. I found that error message pretty
confusing, and didn't realize that it effectively meant the connection was
refused.
The change for issue #13215 removes the retry behavior entirely, so this bug
does not appear in 3.3 and up.
----------
assignee: ronaldoussoren
components: Library (Lib), Macintosh
messages: 193069
nosy: Michael.Ballantyne, ronaldoussoren
priority: normal
severity: normal
status: open
title: Multiprocessing connection SocketClient retries connection on socket
type: behavior
versions: Python 2.6, Python 2.7, Python 3.1, Python 3.2
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<http://bugs.python.org/issue18455>
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