Gabriel de Perthuis ony...@users.sourceforge.net added the comment:
Apparently the pool workers die all at once, just after the pool creates
them and before the pool is used.
I added a few lines to multiprocessing/pool.py to get the stack and the
exception backtrace.
except (EOFError, IOError):
import traceback
debug(traceback.format_exc())
debug(''.join(traceback.format_stack()))
debug('worker got EOFError or IOError -- exiting')
break
INFO::Rule dispatcher::multiprocessing::child process calling self.run()
DEBUG::Rule dispatcher::multiprocessing::created semlock with handle
3082559488
DEBUG::Rule dispatcher::multiprocessing::created semlock with handle
3082104832
DEBUG::Rule dispatcher::multiprocessing::created semlock with handle
3081826304
DEBUG::Rule dispatcher::multiprocessing::created semlock with handle
3081822208
INFO::PoolWorker-3:1::multiprocessing::child process calling self.run()
DEBUG::PoolWorker-3:1::multiprocessing::Traceback (most recent call last):
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/pool.py,
line 57, in worker
task = get()
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/queues.py,
line 339, in get
return recv()
IOError: [Errno 9] Bad file descriptor
DEBUG::PoolWorker-3:1::multiprocessing:: File
/home/who/var/co/git-svn/what-base/correlator/bin/correlator, line 30,
in module
what.corr.actors.main.main()
File
/home/who/var/co/git-svn/what-base/correlator/lib/what/corr/actors/main.py,
line 47, in main
rrp.start()
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/process.py,
line 109, in start
self._popen = Popen(self)
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/forking.py,
line 99, in __init__
code = process_obj._bootstrap()
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/process.py,
line 236, in _bootstrap
self.run()
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/process.py,
line 93, in run
self._target(*self._args, **self._kwargs)
File
/home/who/var/co/git-svn/what-base/correlator/lib/what/corr/actors/rule_dispatcher.py,
line 26, in main
initargs=(manager.agg_msgs_queue, ))
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/__init__.py,
line 232, in Pool
return Pool(processes, initializer, initargs)
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/pool.py,
line 107, in __init__
w.start()
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/process.py,
line 109, in start
self._popen = Popen(self)
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/forking.py,
line 99, in __init__
code = process_obj._bootstrap()
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/process.py,
line 236, in _bootstrap
self.run()
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/process.py,
line 93, in run
self._target(*self._args, **self._kwargs)
File
/home/who/.buildout/eggs/multiprocessing-2.6.1.1-py2.6-linux-i686.egg/multiprocessing/pool.py,
line 61, in worker
debug(''.join(traceback.format_stack()))
DEBUG::PoolWorker-3:1::multiprocessing::worker got EOFError or IOError
-- exiting
INFO::PoolWorker-3:1::multiprocessing::process shutting down
DEBUG::PoolWorker-3:1::multiprocessing::running all atexit finalizers
with priority = 0
--
nosy: +onyxg7
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http://bugs.python.org/issue5331
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