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[Bug 1788833] [NEW] Error during ComputeManager.update_available_resource: AttributeError: '_TransactionContextManager' object has no attribute 'async_

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Public bug reported:

Hi all,

I have a rocky openstack cluster. I am using Mariadb galera cluster (3
galera nodes Active/Active) behind haproxy.

When i resize or migrate an instance, I am hitting with the following
errors.

2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task [req-67381a5e-24e2-4dd2-bfc6-693bd1fabb8d 290bb90f6cbc46548951cbcaee0c0a34 9804c6f8ffe148bc9fa7ed409d41cb16 - default default] Error during ComputeManager._heal_instance_info_cache: AttributeError: '_TransactionContextManager' object has no attribute 'async_'
Traceback (most recent call last):

  File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 126, in _object_dispatch
    return getattr(target, method)(*args, **kwargs)

  File "/usr/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 184, in wrapper
    result = fn(cls, context, *args, **kwargs)

  File "/usr/lib/python2.7/dist-packages/nova/objects/instance.py", line 1351, in get_by_host
    use_slave=use_slave)

  File "/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 218, in wrapper
    reader_mode = get_context_manager(context).async_

AttributeError: '_TransactionContextManager' object has no attribute 'async_'
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task Traceback (most recent call last):
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_service/periodic_task.py", line 220, in run_periodic_tasks
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     task(self, context)
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 6632, in _heal_instance_info_cache
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     context, self.host, expected_attrs=[], use_slave=True)
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 177, in wrapper
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     args, kwargs)
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/nova/conductor/rpcapi.py", line 241, in object_class_action_versions
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     args=args, kwargs=kwargs)
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 179, in call
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     retry=self.retry)
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 133, in _send
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     retry=retry)
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 584, in send
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     call_monitor_timeout, retry=retry)
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 575, in _send
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     raise result
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task AttributeError: '_TransactionContextManager' object has no attribute 'async_'
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task Traceback (most recent call last):
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 126, in _object_dispatch
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     return getattr(target, method)(*args, **kwargs)
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 184, in wrapper
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     result = fn(cls, context, *args, **kwargs)
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/nova/objects/instance.py", line 1351, in get_by_host
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     use_slave=use_slave)
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 218, in wrapper
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     reader_mode = get_context_manager(context).async_
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task AttributeError: '_TransactionContextManager' object has no attribute 'async_'
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
2018-08-24 12:07:29.064 19857 INFO nova.compute.resource_tracker [req-67381a5e-24e2-4dd2-bfc6-693bd1fabb8d 290bb90f6cbc46548951cbcaee0c0a34 9804c6f8ffe148bc9fa7ed409d41cb16 - default default] Final resource view: name=kvm4 phys_ram=257618MB used_ram=512MB phys_disk=100816GB used_disk=0GB total_vcpus=40 used_vcpus=0 pci_stats=[]


Full log file is at

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1788833

Title:
  Error during ComputeManager.update_available_resource: AttributeError:
  '_TransactionContextManager' object has no attribute 'async_

Status in OpenStack Compute (nova):
  New

Bug description:
  Hi all,

  I have a rocky openstack cluster. I am using Mariadb galera cluster (3
  galera nodes Active/Active) behind haproxy.

  When i resize or migrate an instance, I am hitting with the following
  errors.

  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task [req-67381a5e-24e2-4dd2-bfc6-693bd1fabb8d 290bb90f6cbc46548951cbcaee0c0a34 9804c6f8ffe148bc9fa7ed409d41cb16 - default default] Error during ComputeManager._heal_instance_info_cache: AttributeError: '_TransactionContextManager' object has no attribute 'async_'
  Traceback (most recent call last):

    File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 126, in _object_dispatch
      return getattr(target, method)(*args, **kwargs)

    File "/usr/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 184, in wrapper
      result = fn(cls, context, *args, **kwargs)

    File "/usr/lib/python2.7/dist-packages/nova/objects/instance.py", line 1351, in get_by_host
      use_slave=use_slave)

    File "/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 218, in wrapper
      reader_mode = get_context_manager(context).async_

  AttributeError: '_TransactionContextManager' object has no attribute 'async_'
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task Traceback (most recent call last):
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_service/periodic_task.py", line 220, in run_periodic_tasks
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     task(self, context)
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/nova/compute/manager.py", line 6632, in _heal_instance_info_cache
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     context, self.host, expected_attrs=[], use_slave=True)
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 177, in wrapper
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     args, kwargs)
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/nova/conductor/rpcapi.py", line 241, in object_class_action_versions
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     args=args, kwargs=kwargs)
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_messaging/rpc/client.py", line 179, in call
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     retry=self.retry)
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_messaging/transport.py", line 133, in _send
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     retry=retry)
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 584, in send
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     call_monitor_timeout, retry=retry)
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py", line 575, in _send
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     raise result
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task AttributeError: '_TransactionContextManager' object has no attribute 'async_'
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task Traceback (most recent call last):
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 126, in _object_dispatch
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     return getattr(target, method)(*args, **kwargs)
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 184, in wrapper
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     result = fn(cls, context, *args, **kwargs)
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/nova/objects/instance.py", line 1351, in get_by_host
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     use_slave=use_slave)
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task   File "/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 218, in wrapper
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task     reader_mode = get_context_manager(context).async_
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task AttributeError: '_TransactionContextManager' object has no attribute 'async_'
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
  2018-08-24 12:06:37.668 19857 ERROR oslo_service.periodic_task 
  2018-08-24 12:07:29.064 19857 INFO nova.compute.resource_tracker [req-67381a5e-24e2-4dd2-bfc6-693bd1fabb8d 290bb90f6cbc46548951cbcaee0c0a34 9804c6f8ffe148bc9fa7ed409d41cb16 - default default] Final resource view: name=kvm4 phys_ram=257618MB used_ram=512MB phys_disk=100816GB used_disk=0GB total_vcpus=40 used_vcpus=0 pci_stats=[]

  
  Full log file is at

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