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[Bug 1599086] [NEW] Security groups: exception under load

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Gary Kotton <1599086@xxxxxxxxxxxxxxxxxx>
Date: Tue, 05 Jul 2016 09:14:11 -0000
Reply-to: Bug 1599086 <1599086@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:


For one of the iteration, adding router interface failed showing the below DB error.

2016-07-04 17:12:59.057 ERROR neutron.api.v2.resource [req-33bb4fd7-25a5-4460-82d0-ab5e5b8d574c ctx_rally_8204b9df57e44bcf9804a278c35bf2a4_user_0 8204b9df57e44bcf9804a278c35bf2a4] add_router_interface failed
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource Traceback (most recent call last):
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/api/v2/resource.py", line 84, in resource
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     result = method(request=request, **args)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_db/api.py", line 148, in wrapper
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     ectxt.value = e.inner_exc
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.force_reraise()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     six.reraise(self.type_, self.value, self.tb)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_db/api.py", line 138, in wrapper
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     return f(*args, **kwargs)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/api/v2/base.py", line 217, in _handle_action
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     ret_value = getattr(self._plugin, name)(*arg_list, **kwargs)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/plugins/nsx_v3/plugin.py", line 1509, in add_router_interface
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     interface=info)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/dhcp_meta/rpc.py", line 121, in handle_router_metadata_access
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     plugin, ctx_elevated, router_id)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/dhcp_meta/rpc.py", line 171, in _create_metadata_access_network
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     {'network': net_data})
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/plugins/nsx_v3/plugin.py", line 452, in create_network
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self._ensure_default_security_group(context, tenant_id)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/securitygroups_db.py", line 710, in _ensure_default_security_group
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     return self._create_default_security_group(context, tenant_id)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/securitygroups_db.py", line 721, in _create_default_security_group
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     context, security_group, default_sg=True)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/plugins/nsx_v3/plugin.py", line 1759, in create_security_group
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     firewall.delete_section(section_id)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.force_reraise()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     six.reraise(self.type_, self.value, self.tb)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/plugins/nsx_v3/plugin.py", line 1736, in create_security_group
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     context, security_group, default_sg))
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/securitygroups_db.py", line 189, in create_security_group
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     **kwargs)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.gen.next()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/api.py", line 89, in autonested_transaction
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     yield tx
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 490, in __exit__
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.rollback()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/langhelpers.py", line 60, in __exit__
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     compat.reraise(exc_type, exc_value, exc_tb)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 487, in __exit__
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.commit()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 392, in commit
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self._prepare_impl()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 372, in _prepare_impl
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.session.flush()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 2019, in flush
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self._flush(objects)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 2137, in _flush
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     transaction.rollback(_capture_exception=True)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/langhelpers.py", line 60, in __exit__
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     compat.reraise(exc_type, exc_value, exc_tb)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 2101, in _flush
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     flush_context.execute()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/unitofwork.py", line 373, in execute
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     rec.execute(self)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/unitofwork.py", line 532, in execute
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     uow
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/persistence.py", line 174, in save_obj
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     mapper, table, insert)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/persistence.py", line 767, in _emit_insert_statements
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     execute(statement, multiparams)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 914, in execute
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     return meth(self, multiparams, params)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/sql/elements.py", line 323, in _execute_on_connection
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     return connection._execute_clauseelement(self, multiparams, params)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1010, in _execute_clauseelement
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     compiled_sql, distilled_params
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1146, in _execute_context
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     context)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1337, in _handle_dbapi_exception
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     util.raise_from_cause(newraise, exc_info)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/compat.py", line 200, in raise_from_cause
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     reraise(type(exception), exception, tb=exc_tb, cause=cause)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1139, in _execute_context
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     context)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line 450, in do_execute
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     cursor.execute(statement, parameters)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 158, in execute
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     result = self._query(query)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 308, in _query
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     conn.query(q)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 820, in query
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self._affected_rows = self._read_query_result(unbuffered=unbuffered)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1002, in _read_query_result
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     result.read()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1285, in read
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     first_packet = self.connection._read_packet()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 966, in _read_packet
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     packet.check_error()
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 394, in check_error
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     err.raise_mysql_exception(self._data)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 120, in raise_mysql_exception
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     _check_mysql_exception(errinfo)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 112, in _check_mysql_exception
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     raise errorclass(errno, errorvalue)
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource DBError: (pymysql.err.IntegrityError) (1062, u"Duplicate entry '' for key 'PRIMARY'") [SQL: u'INSERT INTO default_security_group (tenant_id, security_group_id) VALUES (%(tenant_id)s, %(security_group_id)s)'] [parameters: {'tenant_id': '', 'security_group_id': '7e39244d-922c-4e3a-b93e-db6125bcb7e6'}]
2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource

** Affects: neutron
     Importance: Undecided
     Assignee: Gary Kotton (garyk)
         Status: In Progress

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https://bugs.launchpad.net/bugs/1599086

Title:
  Security groups: exception under load

Status in neutron:
  In Progress

Bug description:
  
  For one of the iteration, adding router interface failed showing the below DB error.

  2016-07-04 17:12:59.057 ERROR neutron.api.v2.resource [req-33bb4fd7-25a5-4460-82d0-ab5e5b8d574c ctx_rally_8204b9df57e44bcf9804a278c35bf2a4_user_0 8204b9df57e44bcf9804a278c35bf2a4] add_router_interface failed
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource Traceback (most recent call last):
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/api/v2/resource.py", line 84, in resource
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     result = method(request=request, **args)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_db/api.py", line 148, in wrapper
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     ectxt.value = e.inner_exc
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.force_reraise()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     six.reraise(self.type_, self.value, self.tb)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_db/api.py", line 138, in wrapper
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     return f(*args, **kwargs)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/api/v2/base.py", line 217, in _handle_action
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     ret_value = getattr(self._plugin, name)(*arg_list, **kwargs)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/plugins/nsx_v3/plugin.py", line 1509, in add_router_interface
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     interface=info)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/dhcp_meta/rpc.py", line 121, in handle_router_metadata_access
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     plugin, ctx_elevated, router_id)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/dhcp_meta/rpc.py", line 171, in _create_metadata_access_network
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     {'network': net_data})
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/plugins/nsx_v3/plugin.py", line 452, in create_network
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self._ensure_default_security_group(context, tenant_id)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/securitygroups_db.py", line 710, in _ensure_default_security_group
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     return self._create_default_security_group(context, tenant_id)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/securitygroups_db.py", line 721, in _create_default_security_group
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     context, security_group, default_sg=True)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/plugins/nsx_v3/plugin.py", line 1759, in create_security_group
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     firewall.delete_section(section_id)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.force_reraise()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     six.reraise(self.type_, self.value, self.tb)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/plugins/nsx_v3/plugin.py", line 1736, in create_security_group
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     context, security_group, default_sg))
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/securitygroups_db.py", line 189, in create_security_group
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     **kwargs)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.gen.next()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/api.py", line 89, in autonested_transaction
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     yield tx
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 490, in __exit__
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.rollback()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/langhelpers.py", line 60, in __exit__
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     compat.reraise(exc_type, exc_value, exc_tb)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 487, in __exit__
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.commit()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 392, in commit
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self._prepare_impl()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 372, in _prepare_impl
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self.session.flush()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 2019, in flush
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self._flush(objects)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 2137, in _flush
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     transaction.rollback(_capture_exception=True)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/langhelpers.py", line 60, in __exit__
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     compat.reraise(exc_type, exc_value, exc_tb)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 2101, in _flush
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     flush_context.execute()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/unitofwork.py", line 373, in execute
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     rec.execute(self)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/unitofwork.py", line 532, in execute
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     uow
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/persistence.py", line 174, in save_obj
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     mapper, table, insert)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/persistence.py", line 767, in _emit_insert_statements
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     execute(statement, multiparams)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 914, in execute
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     return meth(self, multiparams, params)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/sql/elements.py", line 323, in _execute_on_connection
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     return connection._execute_clauseelement(self, multiparams, params)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1010, in _execute_clauseelement
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     compiled_sql, distilled_params
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1146, in _execute_context
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     context)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1337, in _handle_dbapi_exception
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     util.raise_from_cause(newraise, exc_info)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/compat.py", line 200, in raise_from_cause
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     reraise(type(exception), exception, tb=exc_tb, cause=cause)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1139, in _execute_context
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     context)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line 450, in do_execute
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     cursor.execute(statement, parameters)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 158, in execute
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     result = self._query(query)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 308, in _query
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     conn.query(q)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 820, in query
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     self._affected_rows = self._read_query_result(unbuffered=unbuffered)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1002, in _read_query_result
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     result.read()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1285, in read
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     first_packet = self.connection._read_packet()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 966, in _read_packet
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     packet.check_error()
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 394, in check_error
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     err.raise_mysql_exception(self._data)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 120, in raise_mysql_exception
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     _check_mysql_exception(errinfo)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 112, in _check_mysql_exception
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource     raise errorclass(errno, errorvalue)
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource DBError: (pymysql.err.IntegrityError) (1062, u"Duplicate entry '' for key 'PRIMARY'") [SQL: u'INSERT INTO default_security_group (tenant_id, security_group_id) VALUES (%(tenant_id)s, %(security_group_id)s)'] [parameters: {'tenant_id': '', 'security_group_id': '7e39244d-922c-4e3a-b93e-db6125bcb7e6'}]
  2016-07-04 17:12:59.057 TRACE neutron.api.v2.resource

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Follow ups

[Bug 1599086] Re: Security groups: exception under load
From: Roman Podoliaka, 2016-11-03
[Bug 1599086] Re: Security groups: exception under load
From: Ihar Hrachyshka, 2016-10-07
[Bug 1599086] Re: Security groups: exception under load
From: Kevin Benton, 2016-07-06