[issue41714] multiprocessing.Queue deadlock

[Richard Purdie]

Richard Purdie <richard.purdie at linuxfoundation.org> added the comment:

I should also add that if we don't use cancel_join_thread() in the parser processes, things all work out ok. There is therefore seemingly something odd about the state that is leaving things in.
This issue doesn't occur every time, its maybe 1 in 40 runs where we throw parsing errors but I can brute force reproduce it.

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<https://bugs.python.org/issue41714>
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