2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions [req-40c1773b-d2c8-4a08-8c07-c7d6e88563f6 0989cabab0124d578b69f1e4aa9a1841 7d5a2d6a87b7425b84a23a673a1a530d - - -] Unexpected exception in API method
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions Traceback (most recent call last):
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/api/openstack/extensions.py", line 478, in wrapped
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions return f(*args, **kwargs)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/api/validation/__init__.py", line 73, in wrapper
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions return func(*args, **kwargs)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/api/openstack/compute/volumes.py", line 318, in create
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions volume_id, device)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 171, in wrapped
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions return func(self, context, target, *args, **kwargs)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 160, in inner
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions return function(self, context, instance, *args, **kwargs)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 141, in inner
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions return f(self, context, instance, *args, **kw)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 3189, in attach_volume
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions disk_bus, device_type)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 3125, in _attach_volume
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions device_type=device_type)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/compute/api.py", line 3108, in _create_volume_bdm
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions device_type=device_type)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/nova/compute/rpcapi.py", line 888, in reserve_block_device_name
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions return cctxt.call(ctxt, 'reserve_block_device_name', **kw)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 158, in call
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions retry=self.retry)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 90, in _send
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions timeout=timeout, retry=retry)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 470, in send
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions retry=retry)
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 461, in _send
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions raise result
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions NovaException_Remote: No free disk device names for prefix 'vd'
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions Traceback (most recent call last):
2017-11-17 10:01:37.956 2666 ERROR nova.api.openstack.extensions
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