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[Bug 1784070] [NEW] Orphaned Object Error: Cannot call save on orphaned Instance object nova on lock instance

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Public bug reported:

When trying to lock an instance immediately after boot `nova lock
<UUID>` we are encountering the following error

2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions [req-25225429-0656-4c61-95d6-8624fe9022ce fb155fef17ca4693af4edf04ec7406d7 4cfa00f63d844bf0abaeac0defb8e434 - default default] Unexpected exception in API method
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions Traceback (most recent call last):
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions   File "/openstack/venvs/nova-r14.10.0/lib/python2.7/site-packages/nova/api/openstack/extensions.py", line 338, in wrapped
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions     return f(*args, **kwargs)
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions   File "/openstack/venvs/nova-r14.10.0/lib/python2.7/site-packages/nova/api/openstack/compute/lock_server.py", line 40, in _lock
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions     self.compute_api.lock(context, instance)
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions   File "/openstack/venvs/nova-r14.10.0/lib/python2.7/site-packages/nova/compute/api.py", line 3383, in lock
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions     instance.save()
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions   File "/openstack/venvs/nova-r14.10.0/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 207, in wrapper
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions     objtype=self.obj_name())
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions OrphanedObjectError: Cannot call save on orphaned Instance object
2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions
2018-07-27 18:35:40.067 37341 INFO nova.api.openstack.wsgi [req-25225429-0656-4c61-95d6-8624fe9022ce fb155fef17ca4693af4edf04ec7406d7 4cfa00f63d844bf0abaeac0defb8e434 - default default] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'oslo_versionedobjects.exception.OrphanedObjectError'>

If we put in a wait of 20 second after creating the instance, this does
not occur.

I am seeing this in nova-r14.10.0

pip freeze | grep nova
You are using pip version 8.1.2, however version 18.0 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
nova==14.1.0
nova-lxd==14.2.3.dev10
nova-powervm==3.0.4.dev3
python-novaclient==6.0.2

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1784070

Title:
   Orphaned Object Error: Cannot call save on orphaned Instance object
  nova on lock instance

Status in OpenStack Compute (nova):
  New

Bug description:
  When trying to lock an instance immediately after boot `nova lock
  <UUID>` we are encountering the following error

  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions [req-25225429-0656-4c61-95d6-8624fe9022ce fb155fef17ca4693af4edf04ec7406d7 4cfa00f63d844bf0abaeac0defb8e434 - default default] Unexpected exception in API method
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions Traceback (most recent call last):
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions   File "/openstack/venvs/nova-r14.10.0/lib/python2.7/site-packages/nova/api/openstack/extensions.py", line 338, in wrapped
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions     return f(*args, **kwargs)
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions   File "/openstack/venvs/nova-r14.10.0/lib/python2.7/site-packages/nova/api/openstack/compute/lock_server.py", line 40, in _lock
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions     self.compute_api.lock(context, instance)
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions   File "/openstack/venvs/nova-r14.10.0/lib/python2.7/site-packages/nova/compute/api.py", line 3383, in lock
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions     instance.save()
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions   File "/openstack/venvs/nova-r14.10.0/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 207, in wrapper
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions     objtype=self.obj_name())
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions OrphanedObjectError: Cannot call save on orphaned Instance object
  2018-07-27 18:35:40.064 37341 ERROR nova.api.openstack.extensions
  2018-07-27 18:35:40.067 37341 INFO nova.api.openstack.wsgi [req-25225429-0656-4c61-95d6-8624fe9022ce fb155fef17ca4693af4edf04ec7406d7 4cfa00f63d844bf0abaeac0defb8e434 - default default] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
  <class 'oslo_versionedobjects.exception.OrphanedObjectError'>

  If we put in a wait of 20 second after creating the instance, this
  does not occur.

  I am seeing this in nova-r14.10.0

  pip freeze | grep nova
  You are using pip version 8.1.2, however version 18.0 is available.
  You should consider upgrading via the 'pip install --upgrade pip' command.
  nova==14.1.0
  nova-lxd==14.2.3.dev10
  nova-powervm==3.0.4.dev3
  python-novaclient==6.0.2

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