gevent.monkey.patch_all() internally does "import multiprocessing"
during _gevent_did_monkey_patch (gevent/subprocess.py); without
python3-multiprocessing installed this raises ModuleNotFoundError,
crashing any gunicorn gevent-worker boot. Explains both the direct
import-order test failures and the ConnectionResetError seen in the
control-socket integration tests, since the worker process crashes
mid-boot in both cases.
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Khem Raj
Wang Mingyu