[issue37245] Azure Pipeline 3.8 CI: multiple tests hung and timed out on macOS 10.13

[Steve Dower]

Steve Dower <steve.dower at python.org> added the comment:

> Maybe macOS on Azure is running slower and we should just increase the timeout?

(Aside, why don't the macOS buildbots have a tag saying that? Took me ages to find them...)

I doubt it's running 6-7x slower. More likely something is causing one of the workers to crash at a point where the lock remains held instead of being released (I saw this at work the other week in a slightly different context, but same symptoms).

Could os._exit() at the wrong time cause it?

It also looks like Azure is running tests with 4 processes, but the buildbot (at least the one I'm looking at) is only using 2. So perhaps there are more conflicts from that?

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<https://bugs.python.org/issue37245>
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