Tests pass but process hangs on macOS

[humphd]

I've seen 3 instances of the tests hanging on macOS, and as a result, we timeout or fail CI builds:

1. Node.js CI / build (macos-latest, 12.x) (pull_request) Cancelled after 360m — build (macos-latest, 12.x)
2. on TravisCI here
3. On Slack I saw some students mention having to kill the tests manually.

Let's figure out what's happening here. It looks like we need to kill a process that's hung, maybe the feed worker?

[humphd]

I wonder if we should disable the macOS builders until we solve this? GitHub is spinning for 3.5+ hours each time, and it's failing all our builds.

[tonyvugithub]

@humphd : I think the macos process back to normal now.

[humphd]

There's a saying: "you never want to lose a bee in your house." It might be gone, but that's not the same as it being taken care of!

It's strange that we had multiple different CI systems all failing with the same problem. I'd love to understand why.

[HyperTHD]

This issue hasn't been occurring in the last few months, so closing this for now. Will open up a new issue if this starts becoming more prevalent in the future