** Also affects: cinder
   Importance: Undecided
       Status: New

** Changed in: cinder
       Status: New => Triaged

** Changed in: cinder
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1350466

Title:
  deadlock in scheduler expire reservation periodic task

Status in Cinder:
  Triaged
Status in OpenStack Compute (Nova):
  In Progress

Bug description:
  http://logs.openstack.org/54/105554/4/check/gate-tempest-dsvm-neutron-
  large-
  ops/45501af/logs/screen-n-sch.txt.gz?level=TRACE#_2014-07-30_16_26_20_158

  
  2014-07-30 16:26:20.158 17209 ERROR nova.openstack.common.periodic_task [-] 
Error during SchedulerManager._expire_reservations: (OperationalError) (1213, 
'Deadlock found when trying to get lock; try restarting transaction') 'UPDATE 
reservations SET updated_at=updated_at, deleted_at=%s, deleted=id WHERE 
reservations.deleted = %s AND reservations.expire < %s' 
(datetime.datetime(2014, 7, 30, 16, 26, 20, 152098), 0, datetime.datetime(2014, 
7, 30, 16, 26, 20, 149665))
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task 
Traceback (most recent call last):
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/opt/stack/new/nova/nova/openstack/common/periodic_task.py", line 198, in 
run_periodic_tasks
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
task(self, context)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/opt/stack/new/nova/nova/scheduler/manager.py", line 157, in 
_expire_reservations
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
QUOTAS.expire(context)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/opt/stack/new/nova/nova/quota.py", line 1401, in expire
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
self._driver.expire(context)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/opt/stack/new/nova/nova/quota.py", line 651, in expire
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
db.reservation_expire(context)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/opt/stack/new/nova/nova/db/api.py", line 1173, in reservation_expire
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
return IMPL.reservation_expire(context)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/opt/stack/new/nova/nova/db/sqlalchemy/api.py", line 149, in wrapper
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
return f(*args, **kwargs)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/opt/stack/new/nova/nova/db/sqlalchemy/api.py", line 3394, in 
reservation_expire
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
reservation_query.soft_delete(synchronize_session=False)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/opt/stack/new/nova/nova/openstack/common/db/sqlalchemy/session.py", line 
694, in soft_delete
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
synchronize_session=synchronize_session)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2690, in 
update
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
update_op.exec_()
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/persistence.py", line 
816, in exec_
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
self._do_exec()
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/persistence.py", line 
913, in _do_exec
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
update_stmt, params=self.query._params)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/opt/stack/new/nova/nova/openstack/common/db/sqlalchemy/session.py", line 
444, in _wrap
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
_raise_if_deadlock_error(e, self.bind.dialect.name)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task   
File "/opt/stack/new/nova/nova/openstack/common/db/sqlalchemy/session.py", line 
427, in _raise_if_deadlock_error
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task     
raise exception.DBDeadlock(operational_error)
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task 
DBDeadlock: (OperationalError) (1213, 'Deadlock found when trying to get lock; 
try restarting transaction') 'UPDATE reservations SET updated_at=updated_at, 
deleted_at=%s, deleted=id WHERE reservations.deleted = %s AND 
reservations.expire < %s' (datetime.datetime(2014, 7, 30, 16, 26, 20, 152098), 
0, datetime.datetime(2014, 7, 30, 16, 26, 20, 149665))
  2014-07-30 16:26:20.158 17209 TRACE nova.openstack.common.periodic_task 

  
  message:"nova.openstack.common.periodic_task" AND message:"Deadlock found" 
AND NOT tags:"console" AND tags:"screen-n-sch.txt"

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