Comment 1 for bug 1745168

(9:48:27 AM) geguileo: Jan 24 15:04:16.031978 ubuntu-xenial-citycloud-sto2-0002119447 cinder-backup[11788]: Traceback (most recent call last):
(9:48:28 AM) geguileo: Jan 24 15:04:16.032126 ubuntu-xenial-citycloud-sto2-0002119447 cinder-backup[11788]: File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/hub.py", line 457, in fire_timers
(9:48:30 AM) geguileo: Jan 24 15:04:16.032267 ubuntu-xenial-citycloud-sto2-0002119447 cinder-backup[11788]: timer()
(9:48:32 AM) geguileo: Jan 24 15:04:16.032404 ubuntu-xenial-citycloud-sto2-0002119447 cinder-backup[11788]: File "/usr/local/lib/python2.7/dist-packages/eventlet/hubs/timer.py", line 58, in __call__
(9:48:35 AM) geguileo: Jan 24 15:04:16.032559 ubuntu-xenial-citycloud-sto2-0002119447 cinder-backup[11788]: cb(*args, **kw)
(9:48:36 AM) geguileo: Jan 24 15:04:16.032703 ubuntu-xenial-citycloud-sto2-0002119447 cinder-backup[11788]: File "/usr/local/lib/python2.7/dist-packages/eventlet/semaphore.py", line 145, in _do_acquire
(9:48:38 AM) geguileo: Jan 24 15:04:16.032840 ubuntu-xenial-citycloud-sto2-0002119447 cinder-backup[11788]: waiter.switch()
(9:48:40 AM) geguileo: Jan 24 15:04:16.032990 ubuntu-xenial-citycloud-sto2-0002119447 cinder-backup[11788]: error: cannot switch to a different thread
(9:48:44 AM) geguileo: jungleboyj: ^ that's happening because a native thread withing a greenthread is logging
(9:48:56 AM) geguileo: jungleboyj: I'll try to figure out now where is this happening
(9:49:22 AM) openstackgerrit: Aseel Awwad proposed openstack/cinder master: Add policy check for complete attachment API action https://review.openstack.org/536119
(9:49:23 AM) mriedem: geguileo: nice spot, because this merged the same day https://github.com/openstack/cinder/commit/1a569e15c35d772a8ca236d75cd1840a415983d3
(9:49:30 AM) mriedem: geguileo: something is logging where it shouldn't be