Hi,

Please find the information below.

For the first run:
------------------

In /etc/neutron/neutron.conf:

The parameters are commented as below.
#max_pool_size = 5
#retry_interval = 10
#max_overflow = 50
#pool_max_size = 30
#pool_max_overflow = 0
#pool_timeout = 30

And in nova.conf, I didn't set max_pool_size and max_overflow.

Neutron Logs:

2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource [req-65a024cc-dad4-4484-98f4-349be67cb7aa admin -] index failed: No details.
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource Traceback (most recent call last):
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/opt/stack/neutron/neutron/api/v2/resource.py", line 79, in resource
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     result = method(request=request, **args)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/api.py", line 88, in wrapped
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     setattr(e, '_RETRY_EXCEEDED', True)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     self.force_reraise()
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     six.reraise(self.type_, self.value, self.tb)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/api.py", line 84, in wrapped
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     return f(*args, **kwargs)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_db/api.py", line 151, in wrapper
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     ectxt.value = e.inner_exc
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     self.force_reraise()
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     six.reraise(self.type_, self.value, self.tb)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_db/api.py", line 139, in wrapper
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     return f(*args, **kwargs)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/api.py", line 124, in wrapped
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     traceback.format_exc())
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     self.force_reraise()
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     six.reraise(self.type_, self.value, self.tb)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/api.py", line 119, in wrapped
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     return f(*dup_args, **dup_kwargs)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/opt/stack/neutron/neutron/api/v2/base.py", line 361, in index
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     return self._items(request, True, parent_id)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/opt/stack/neutron/neutron/api/v2/base.py", line 300, in _items
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     obj_list = obj_getter(request.context, **kwargs)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/opt/stack/vmware-nsx/vmware_nsx/plugins/nsx_v3/plugin.py", line 2150, in get_ports
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     limit, marker, page_reverse))
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/api.py", line 159, in wrapped
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     return method(*args, **kwargs)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/opt/stack/neutron/neutron/db/db_base_plugin_v2.py", line 1301, in get_ports
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     items = [self._make_port_dict(c, fields) for c in query]
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2761, in __iter__
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     return self._execute_and_instances(context)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2774, in _execute_and_instances
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     close_with_result=True)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2765, in _connection_from_session
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     **kw)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 893, in connection
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     execution_options=execution_options)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 898, in _connection_for_bind
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     engine, execution_options)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 334, in _connection_for_bind
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     conn = bind.contextual_connect()
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2039, in contextual_connect
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     self._wrap_pool_connect(self.pool.connect, None),
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2074, in _wrap_pool_connect
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     return fn()
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 376, in connect
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     return _ConnectionFairy._checkout(self)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 713, in _checkout
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     fairy = _ConnectionRecord.checkout(pool)
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 480, in checkout
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     rec = pool._do_get()
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource   File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 1053, in _do_get
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource     (self.size(), self.overflow(), self._timeout))
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource TimeoutError: QueuePool limit of size 10 overflow 20 reached, connection timed out, timeout 10
2016-11-02 20:42:00.247 18058 ERROR neutron.api.v2.resource


Nova Logs:

2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack [req-fe286739-1aed-4a6d-b738-78e406fe1faf admin admin] Caught error: Request Failed: internal server error while processing your request.
Neutron server returns request_ids: ['req-65a024cc-dad4-4484-98f4-349be67cb7aa']
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack Traceback (most recent call last):
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/api/openstack/__init__.py", line 89, in __call__
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     return req.get_response(self.application)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1299, in send
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     application, catch_exc_info=False)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1263, in call_application
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     app_iter = application(self.environ, start_response)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     return resp(environ, start_response)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     resp = self.call_func(req, *args, **self.kwargs)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     return self.func(req, *args, **kwargs)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/keystonemiddleware/auth_token/__init__.py", line 323, in __call__
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     response = req.get_response(self._app)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1299, in send
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     application, catch_exc_info=False)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/request.py", line 1263, in call_application
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     app_iter = application(self.environ, start_response)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     return resp(environ, start_response)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     return resp(environ, start_response)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/routes/middleware.py", line 141, in __call__
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     response = self.app(environ, start_response)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 144, in __call__
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     return resp(environ, start_response)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 130, in __call__
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     resp = self.call_func(req, *args, **self.kwargs)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/webob/dec.py", line 195, in call_func
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     return self.func(req, *args, **kwargs)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/api/openstack/wsgi.py", line 609, in __call__
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     content_type, body, accept)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/api/openstack/wsgi.py", line 689, in _process_stack
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     request, action_args)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/api/openstack/wsgi.py", line 555, in process_extensions
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     **action_args)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/api/openstack/compute/security_groups.py", line 489, in show
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     return self._show(req, resp_obj)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/api/openstack/compute/security_groups.py", line 485, in _show
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     self._extend_servers(req, [resp_obj.obj['server']])
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/api/openstack/compute/security_groups.py", line 467, in _extend_servers
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     servers))
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/network/security_group/neutron_driver.py", line 380, in get_instances_security_groups_bindings
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     ports = self._get_ports_from_server_list(servers, neutron)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/network/security_group/neutron_driver.py", line 339, in _get_ports_from_server_list
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     ports.extend(neutron.list_ports(**search_opts).get('ports'))
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 97, in wrapper
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     ret = obj(*args, **kwargs)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 742, in list_ports
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     **_params)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 97, in wrapper
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     ret = obj(*args, **kwargs)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 375, in list
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     for r in self._pagination(collection, path, **params):
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 390, in _pagination
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     res = self.get(path, params=params)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 97, in wrapper
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     ret = obj(*args, **kwargs)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 360, in get
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     headers=headers, params=params)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 97, in wrapper
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     ret = obj(*args, **kwargs)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 337, in retry_request
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     headers=headers, params=params)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 97, in wrapper
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     ret = obj(*args, **kwargs)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 300, in do_request
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     self._handle_fault_response(status_code, replybody, resp)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/opt/stack/nova/nova/network/neutronv2/api.py", line 97, in wrapper
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     ret = obj(*args, **kwargs)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 275, in _handle_fault_response
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     exception_handler_v20(status_code, error_body)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack   File "/usr/local/lib/python2.7/dist-packages/neutronclient/v2_0/client.py", line 91, in exception_handler_v20
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack     request_ids=request_ids)
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack InternalServerError: Request Failed: internal server error while processing your request.
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack Neutron server returns request_ids: ['req-65a024cc-dad4-4484-98f4-349be67cb7aa']
2016-11-02 20:42:00.268 17626 ERROR nova.api.openstack