Message 368183 - Python tracker

I have also explored a few different solutions and was unable to find a fix for this issue. If it's still causing intermittent hangs after Andrew's patch, we may want to consider skipping `test_close_kill_running` for `MultiLoopWatcher` until we can find one. This clearly seems to be a complex issue without an easy solution, and I don't think we want it to potentially mask other issues in the meantime.