2015-08-18 10:17:02.020 ERROR nova.compute.manager [req-c227c32a-9c61-4515-9884-90128104e0cc admin admin] [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc] Failed to attach dc88faa0-b710-4c5a-baaf-d8f2a450efe9 at /dev/vdb
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc] Traceback (most recent call last):
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/opt/stack/nova/nova/compute/manager.py", line 4499, in _attach_volume
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     do_check_attach=False, do_driver_attach=True)
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/opt/stack/nova/nova/virt/block_device.py", line 52, in wrapped
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     ret_val = method(obj, context, *args, **kwargs)
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/opt/stack/nova/nova/virt/block_device.py", line 241, in attach
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     connector)
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/opt/stack/nova/nova/volume/cinder.py", line 223, in wrapper
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     six.reraise(exc_value, None, exc_trace)
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/opt/stack/nova/nova/volume/cinder.py", line 212, in wrapper
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     res = method(self, ctx, volume_id, *args, **kwargs)
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/opt/stack/nova/nova/volume/cinder.py", line 347, in initialize_connection
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     connector)
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/usr/local/lib/python2.7/dist-packages/cinderclient/v2/volumes.py", line 448, in initialize_connection
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     {'connector': connector})[1]['connection_info']
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/usr/local/lib/python2.7/dist-packages/cinderclient/v2/volumes.py", line 379, in _action
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     return self.api.client.post(url, body=body)
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/usr/local/lib/python2.7/dist-packages/cinderclient/client.py", line 104, in post
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     return self._cs_request(url, 'POST', **kwargs)
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/usr/local/lib/python2.7/dist-packages/cinderclient/client.py", line 98, in _cs_request
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     return self.request(url, method, **kwargs)
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]   File "/usr/local/lib/python2.7/dist-packages/cinderclient/client.py", line 91, in request
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc]     raise exceptions.from_response(resp, body)
2015-08-18 10:17:02.020 31095 ERROR nova.compute.manager [instance: 9926400a-72b6-44e0-89c1-ce2a32832dfc] ClientException: The server has either erred or is incapable of performing the requested operation. (HTTP 500) (Request-ID: req-0ff37083-9611-483c-b5a6-9bf7aeb33b0a)