See if green_existing_locks works?

logging_locks.py

import logging
import eventlet.patcher
eventlet.patcher.monkey_patch(thread=True)
import threading


def take_and_release():
    try:
        logging._lock.acquire()
    finally:
        logging._lock.release()

assert logging._lock.acquire()
t = threading.Thread(target=take_and_release)
t.start()
t.join(timeout=1)
# we should timeout, and the thread is still blocking
assert t.isAlive()
logging._lock.release()
t.join(timeout=1)
assert not t.isAlive()
print('locking works')

Submitted that as eventlet/eventlet#754 -- FWIW, if I add

eventlet.patcher._fix_py3_rlock(logging._lock)

right after monkey patching, this guy seems happy on older py3 versions.