[Backport maintenance/2.15.x] Avoid hanging forever after a parallel job was killed #7930
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* Replace multiprocessing.pool with concurrent.futures.ProcessPoolExecutor to avoid deadlocks. In a multiprocessing.pool, if a process terminates in a non-clean fashion (for example, due to OOM or a segmentation fault), the pool will silently replace said process, but the work that the process was supposed to do will never be done, causing pylint to hang indefinitely. The concurrent.futures.ProcessPoolExecutor will raise a BrokenProcessPool exception in that case, avoiding the hang. Co-authored-by: Daniël van Noord <13665637+DanielNoord@users.noreply.github.com> Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> (cherry picked from commit 5eca8ec)
Pierre-Sassoulas
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Dec 13, 2022
Pierre-Sassoulas
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Backport 5eca8ec from #7834.