Comment 2 for bug 1907295

2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments [req-8be05ad0-c25f-4efd-bfca-ba23f17e10fb a6589c24b4724a8ca3a1206139b7b3a2 c40b5deebda84c2e9dfe6c2bf084318c - default default] Unable to update attachment.(Invalid volume: duplicate connectors detected on volume c6697aa5-1e39-41e6-ae76-8e4906517f0a).: InvalidVolume: Invalid volume: duplicate connectors detected on volume c6697aa5-1e39-41e6-ae76-8e4906517f0a
2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments Traceback (most recent call last):
2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments File "/usr/lib/python2.7/site-packages/cinder/api/v3/attachments.py", line 228, in update
2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments connector))
2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments File "<string>", line 2, in attachment_update
2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments File "/usr/lib/python2.7/site-packages/cinder/coordination.py", line 151, in _synchronized
2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments return f(*a, **k)
2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments File "/usr/lib/python2.7/site-packages/cinder/volume/api.py", line 2197, in attachment_update
2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments raise exception.InvalidVolume(reason=msg)
2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments InvalidVolume: Invalid volume: duplicate connectors detected on volume c6697aa5-1e39-41e6-ae76-8e4906517f0a
2020-12-02 14:02:09.408 28 ERROR cinder.api.v3.attachments
2020-12-02 14:02:09.409 28 INFO cinder.api.openstack.wsgi [req-8be05ad0-c25f-4efd-bfca-ba23f17e10fb a6589c24b4724a8ca3a1206139b7b3a2 c40b5deebda84c2e9dfe6c2bf084318c - default default] HTTP exception thrown: Unable to update attachment.(Invalid volume: duplicate connectors detected on volume c6697aa5-1e39-41e6-ae76-8e4906517f0a).
2020-12-02 14:02:09.409 28 INFO cinder.api.openstack.wsgi [req-8be05ad0-c25f-4efd-bfca-ba23f17e10fb a6589c24b4724a8ca3a1206139b7b3a2 c40b5deebda84c2e9dfe6c2bf084318c - default default] http://10.148.59.10:8776/v3/c40b5deebda84c2e9dfe6c2bf084318c/attachments/0991b5d7-b263-41c9-b95b-b2c1bd637d0a returned with HTTP 500