Open Stack

neutron-18.0.0
tenacity-7.0.0
Python-3.9.4

neutron-linuxbridge-agent exits with
AttributeError: 'FileNotFoundError' object has no attribute 'returncode'

neutron/plugins/ml2/drivers/linuxbridge/agent/arp_protect.py:
..
@tenacity.retry(
     wait=tenacity.wait_exponential(multiplier=0.02),
     retry=tenacity.retry_if_exception(lambda e: e.returncode == 255),
     reraise=True
)
..

Not a python programmer. But I guess it has something to do with
Python39