[root@w3 ~]# journalctl -fu neutron-linuxbridge-agent
-- Logs begin at Wed 2022-03-16 04:32:31 EDT. --
Mar 16 09:14:09 w3.int.lunarc sudo[37085]:  neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/neutron-rootwrap /etc/neutron/rootwrap.conf privsep-helper --config-file /usr/share/neutron/neutron-dist.conf --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/linuxbridge_agent.ini --config-dir /etc/neutron/conf.d/neutron-linuxbridge-agent --privsep_context neutron.privileged.default --privsep_sock_path /tmp/tmp93tzwqg3/privsep.sock
Mar 16 09:14:12 w3.int.lunarc sudo[37107]:  neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/neutron-rootwrap /etc/neutron/rootwrap.conf privsep-helper --config-file /usr/share/neutron/neutron-dist.conf --config-file /etc/neutron/neutron.conf --config-file /etc/neutron/plugins/ml2/linuxbridge_agent.ini --config-dir /etc/neutron/conf.d/neutron-linuxbridge-agent --privsep_context neutron.privileged.link_cmd --privsep_sock_path /tmp/tmp81iy5eni/privsep.sock
Mar 16 09:14:15 w3.int.lunarc neutron-linuxbridge-agent[37073]: Traceback (most recent call last):
Mar 16 09:14:15 w3.int.lunarc neutron-linuxbridge-agent[37073]:   File "/usr/lib/python3.6/site-packages/eventlet/hubs/hub.py", line 476, in fire_timers
Mar 16 09:14:15 w3.int.lunarc neutron-linuxbridge-agent[37073]:     timer()
Mar 16 09:14:15 w3.int.lunarc neutron-linuxbridge-agent[37073]:   File "/usr/lib/python3.6/site-packages/eventlet/hubs/timer.py", line 59, in __call__
Mar 16 09:14:15 w3.int.lunarc neutron-linuxbridge-agent[37073]:     cb(*args, **kw)
Mar 16 09:14:15 w3.int.lunarc neutron-linuxbridge-agent[37073]:   File "/usr/lib/python3.6/site-packages/eventlet/semaphore.py", line 152, in _do_acquire
Mar 16 09:14:15 w3.int.lunarc neutron-linuxbridge-agent[37073]:     waiter.switch()
Mar 16 09:14:15 w3.int.lunarc neutron-linuxbridge-agent[37073]: greenlet.error: cannot switch to a different thread