Comment 134 for bug 1863021

You may be right.

I have this in monkey_patch.py:

    # Monkey patch the original current_thread to use the up-to-date _active
    # global variable. See https://bugs.launchpad.net/bugs/1863021 and
    # https://github.com/eventlet/eventlet/issues/592
    import __original_module_threading as orig_threading
    import threading
    orig_threading.current_thread.__globals__['_active'] = threading._active

However, nova-compute logs still get spammed with:

Jun 16 14:06:30 node nova-compute[12592]: Traceback (most recent call last):
Jun 16 14:06:30 node nova-compute[12592]: File "/usr/lib/python3.8/threading.py", line 1454, in _after_fork
Jun 16 14:06:30 node nova-compute[12592]: assert len(_active) == 1
Jun 16 14:06:30 node nova-compute[12592]: AssertionError:
Jun 16 14:06:30 node nova-compute[12592]: Exception ignored in: <function _after_fork at 0x7efdc80b7b80>