On 23/10/13 17:39, Phil Mayers wrote:

  2. Arrange for the epoll object (or FD) to be closed after fork, but
before exec, so that the child process can't fiddle with it

See also:

http://bugs.python.org/issue8713

...which suggests Python 3.4 added fork+exec support to multiprocessing. On Unix and older Python versions, you're stuck with plain fork and all the attendant horribleness.

This is a multiprocessing bug IMHO.

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