[issue4106] multiprocessing occasionally spits out exception during shutdown
Brian Thorne
report at bugs.python.org
Wed Jan 19 00:23:23 CET 2011
Brian Thorne <hardbyte at gmail.com> added the comment:
With the example script attached I see the exception every time. On Ubuntu 10.10 with Python 2.6
Since the offending line in multiprocesing/queues.py (233) is a debug statement, just commenting it out seems to stop this exception.
Looking at the util file shows the logging functions to be all of the form:
if _logger:
_logger.log(...
Could it be possible that after the check the _logger global (or the debug function) is destroyed by the exit handler? Can we convince them to stick around until such a time that they cannot be called?
Adding a small delay before joining also seems to work, but is ugly. Why should another Process *have* to have a minimum amount of work to not throw an exception?
----------
nosy: +Thorney
versions: +Python 2.6 -Python 2.7
Added file: http://bugs.python.org/file20445/test_mult.py
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