[issue8296] multiprocessing.Pool hangs when issuing KeyboardInterrupt

[Andrey Vlasovskikh]

Andrey Vlasovskikh <andrey.vlasovskikh at gmail.com> added the comment:

Despite of several workarounds available on the Web, the problem persists. Almost any exception that is rised in `worker` function while putting or getting tasks from queues result in Pool hang up. Currently, `worker` is only aware of Exception descendants rised inside of the map function parameter.

I've written a unit test that checks if KeyboardInterrupts are handled normally. The source code may be included in `Lib/test/test_multiprocessing.py`.

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Added file: http://bugs.python.org/file16784/test_map_keyboard_interrput.py

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<http://bugs.python.org/issue8296>
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