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[Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>]

** Changed in: neutron
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1288379

Title:
  db Deadlock detected when running 'delete_port

Status in OpenStack Neutron (virtual network service):
  Fix Released

Bug description:
  I'm seeing Deadlocks when deleting large numbers of VMs in a multinode
  system.

  The port delete fails, and then ports are left behind after the VMs are deleted.
  VMs cannot be created as the IP are not released.
  The ports have to be manually deleted. 

  
  2014-02-24 15:18:12.606 1819 ERROR neutron.api.v2.resource [-] delete failed
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource Traceback (most recent call last):
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/neutron/api/v2/resource.py", line 84, in resource
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     result = method(request=request, **args)
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/neutron/api/v2/base.py", line 432, in delete
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     obj_deleter(request.context, id, **kwargs)
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/neutron/plugins/openvswitch/ovs_neutron_plugin.py", line 634, in delete_port
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     super(OVSNeutronPluginV2, self).delete_port(context, id)
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/neutron/db/db_base_plugin_v2.py", line 1403, in delete_port
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     self._delete_port(context, id)
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/neutron/db/db_base_plugin_v2.py", line 1425, in _delete_port
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     a['ip_address'])
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/neutron/db/db_base_plugin_v2.py", line 415, in _recycle_ip
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     ip_address)
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/neutron/db/db_base_plugin_v2.py", line 449, in _delete_ip_allocation
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     subnet_id=subnet_id).delete()
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2581, in delete
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     delete_op.exec_()
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/persistence.py", line 816, in exec_
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     self._do_exec()
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/sqlalchemy/orm/persistence.py", line 942, in _do_exec
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     params=self.query._params)
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/dist-packages/neutron/openstack/common/db/sqlalchemy/session.py", line 531, in _wrap
  2014-02-24 15:18:12.606 1819 TRACE neutron.api.v2.resource     _raise_if_deadlock_error(e, get_engine().name)

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