[New-bugs-announce] [issue4451] multiprocessing fails with "Invalid thread state for this thread" on 2.4 and 2.5

[Christian Heimes]

New submission from Christian Heimes <lists at cheimes.de>:

The multiprocessing backport to 2.4/2.5 fails with a fatal error when
the test suite is run with a debug build of Python.

PYTHONPATH="Lib/" /home/heimes/dev/python/release25-maint/python -tt -c
"from multiprocessing.tests import main; main()"
Fatal Python error: Invalid thread state for this thread
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File
"/home/heimes/dev/py/python-multiprocessing/Lib/multiprocessing/tests.py",
line 1826, in main
    test_main(unittest.TextTestRunner(verbosity=2).run)
  File
"/home/heimes/dev/py/python-multiprocessing/Lib/multiprocessing/tests.py",
line 1805, in test_main
    ManagerMixin.pool = ManagerMixin.manager.Pool(4)
  File
"/home/heimes/dev/py/python-multiprocessing/Lib/multiprocessing/managers.py",
line 637, in temp
    token, exp = self._create(typeid, *args, **kwds)
  File
"/home/heimes/dev/py/python-multiprocessing/Lib/multiprocessing/managers.py",
line 535, in _create
    conn = self._Client(self._address, authkey=self._authkey)
  File
"/home/heimes/dev/py/python-multiprocessing/Lib/multiprocessing/connection.py",
line 142, in Client
    answer_challenge(c, authkey)
  File
"/home/heimes/dev/py/python-multiprocessing/Lib/multiprocessing/connection.py",
line 373, in answer_challenge
    message = connection.recv_bytes(256)         # reject large message
EOFError

----------
components: Interpreter Core
messages: 76528
nosy: christian.heimes, jnoller
priority: high
severity: normal
stage: needs patch
status: open
title: multiprocessing fails with "Invalid thread state for this thread" on 2.4 and 2.5
type: crash
versions: Python 2.4, Python 2.5.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4451>
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