[issue27422] Deadlock when mixing threading and multiprocessing

[Raymond Hettinger]

Raymond Hettinger added the comment:

It is in-fact problem prone (and not just in Python).  The rule is "thread after you fork, not before".  Otherwise, the locks used by the thread executor will get duplicated across processes.  If one of those processes dies while it has the lock, all of the other processes using that lock will deadlock.

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nosy: +rhettinger

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27422>
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