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[Bug 1712480] Re: Soft-deleting vm fails after "nova resize" the vm

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Matt Riedemann <mriedem.os@xxxxxxxxx>
Date: Sun, 02 Sep 2018 14:28:02 -0000
Reply-to: Bug 1712480 <1712480@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
** Also affects: nova/rocky
   Importance: Undecided
       Status: New

** Also affects: nova/queens
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1712480

Title:
  Soft-deleting vm fails after "nova resize"  the vm

Status in OpenStack Compute (nova):
  Fix Released
Status in OpenStack Compute (nova) queens series:
  New
Status in OpenStack Compute (nova) rocky series:
  New

Bug description:
  Description
  ===========
  I use "nova resize" command to resize the vm ,but I don't call "nova resize-confirm" ,then I use "nova delete" command to soft-delete the vm ,it reports ERROR as this:
  Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
  <class 'UnexpectedTaskStateError_Remote'> (HTTP 500) (Request-ID: req-2ee1cacd-78d8-4a9d-b975-dec7d31c8033)
  ERROR (CommandError): Unable to delete the specified server(s).

  
  Steps to reproduce
  ==================
  1)I config nova.conf, make reclaim_instance_interval equal to 60 to enable "soft-delete",
    then restart openstack-nova-api service, restart openstack-nova-compute service.
  1)resize vm1 by "nova resize" command line
  2)delete vm1 by "nova delete" command line

  
  Environment
  ===========
  The branch of OpenStack that I use is "mitaka"

  
  Expected result
  ===============
  The vm is deleted

  
  Actual result
  =============
  The vm is not deleted ,and report ERROR.

  
  Logs & Configs
  ==============
  nova.conf:
   reclaim_instance_interval = 60

  nova-api.log:
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions [req-2ee1cacd-78d8-4a9d-b975-dec7d31c8033 fbc7acf5e66e4a2289f419d257ffba84 95579f6a417e41ca8e8a74fdd8b23b14 - - -] Unexpected exception in API method
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions Traceback (most recent call last):
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/openstack/extensions.py", line 478, in wrapped
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/openstack/compute/servers.py", line 959, in delete
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/openstack/compute/servers.py", line 809, in _delete
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 170, in wrapped
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 159, in inner
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 187, in _wrapped
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 140, in inner
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 1928, in soft_delete
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 1708, in _delete
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     self.force_reraise()
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     six.reraise(self.type_, self.value, self.tb)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 1661, in _delete
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 1757, in _confirm_resize_on_deleting
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/rpcapi.py", line 500, in confirm_resize
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/client.py", line 158, in call
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     retry=self.retry)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/transport.py", line 90, in _send
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     timeout=timeout, retry=retry)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 470, in send
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     retry=retry)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 461, in _send
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     raise result
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions UnexpectedTaskStateError_Remote: Conflict updating instance 282905b9-e342-4a1f-8b13-90750552d8de. Expected: {'task_state': [None, u'deleting']}. Actual: {'task_state': u'soft-deleting'}
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions Traceback (most recent call last):
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/conductor/manager.py", line 90, in _object_dispatch
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 223, in wrapper
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     return fn(self, *args, **kwargs)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/objects/instance.py", line 701, in save
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/api.py", line 809, in instance_update_and_get_original
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 229, in wrapper
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/api.py", line 148, in wrapper
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     ectxt.value = e.inner_exc
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     self.force_reraise()
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     six.reraise(self.type_, self.value, self.tb)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/api.py", line 138, in wrapper
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     return f(*args, **kwargs)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 300, in wrapped
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 2717, in instance_update_and_get_original
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 2853, in _instance_update
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions UnexpectedTaskStateError: Conflict updating instance 282905b9-e342-4a1f-8b13-90750552d8de. Expected: {'task_state': [None, u'deleting']}. Actual: {'task_state': u'soft-deleting'}
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions Traceback (most recent call last):
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 138, in _dispatch_and_reply
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     incoming.message))
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 185, in _dispatch
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     return self._do_dispatch(endpoint, method, ctxt, args)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/dispatcher.py", line 127, in _do_dispatch
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     result = func(ctxt, **new_args)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/exception.py", line 110, in wrapped
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     self.force_reraise()
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     six.reraise(self.type_, self.value, self.tb)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/exception.py", line 89, in wrapped
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 414, in decorated_function
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     return function(self, context, *args, **kwargs)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 392, in decorated_function
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     kwargs['instance'], e, sys.exc_info())
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     self.force_reraise()
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     six.reraise(self.type_, self.value, self.tb)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 380, in decorated_function
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     return function(self, context, *args, **kwargs)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 3529, in confirm_resize
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     do_confirm_resize(context, instance, migration.id)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_concurrency/lockutils.py", line 271, in inner
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     return f(*args, **kwargs)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 3527, in do_confirm_resize
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     migration=migration)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/manager.py", line 3581, in _confirm_resize
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     instance.save(expected_task_state=[None, task_states.DELETING])
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 207, in wrapper
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     ctxt, self, fn.__name__, args, kwargs)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/conductor/rpcapi.py", line 245, in object_action
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/rpc/client.py", line 158, in call
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     retry=self.retry)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/transport.py", line 90, in _send
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     timeout=timeout, retry=retry)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 470, in send
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     retry=retry)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_messaging/_drivers/amqpdriver.py", line 461, in _send
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     raise result
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions UnexpectedTaskStateError_Remote: Conflict updating instance 282905b9-e342-4a1f-8b13-90750552d8de. Expected: {'task_state': [None, u'deleting']}. Actual: {'task_state': u'soft-deleting'}
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions Traceback (most recent call last):
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/conductor/manager.py", line 90, in _object_dispatch
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 223, in wrapper
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     return fn(self, *args, **kwargs)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/objects/instance.py", line 701, in save
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/api.py", line 809, in instance_update_and_get_original
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 229, in wrapper
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/api.py", line 148, in wrapper
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     ectxt.value = e.inner_exc
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     self.force_reraise()
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     six.reraise(self.type_, self.value, self.tb)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/api.py", line 138, in wrapper
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions     return f(*args, **kwargs)
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 300, in wrapped
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 2717, in instance_update_and_get_original
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 2853, in _instance_update
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions UnexpectedTaskStateError: Conflict updating instance 282905b9-e342-4a1f-8b13-90750552d8de. Expected: {'task_state': [None, u'deleting']}. Actual: {'task_state': u'soft-deleting'}
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions
  2017-08-23 10:45:38.233 1458420 ERROR nova.api.openstack.extensions

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https://bugs.launchpad.net/nova/+bug/1712480/+subscriptions
References

[Bug 1712480] [NEW] Soft-deleting vm fails after "nova resize" the vm
From: wind, 2017-08-23