When quota-limit is reached for subnets/vn, internal server error is seen

[Vedamurthy Joshi]

R1.10 28

When in a custom project, I edit contrail-api.conf with below and restarted contrail-api:
[QUOTA]
subnet=2
virtual-network=2

root@nodea9:~# neutron quota-show
+---------------------+-------+
| Field | Value |
+---------------------+-------+
| floatingip | -1 |
| nat_instance | -1 |
| network | 2 |
| port | -1 |
| route_table | -1 |
| router | -1 |
| security_group | -1 |
| security_group_rule | -1 |
| subnet | 2 |
+---------------------+-------+
root@nodea9:~#

Then, i tried to create 3 networks (net1,net2,net3)... on creating net3, we get internal server error.
Same error when subnet limits are reached

<class 'cfgm_common.exceptions.HttpError'>
Python 2.7.3: /usr/bin/python
Mon Sep 1 00:55:04 2014

A problem occurred in a Python script. Here is the sequence of
function calls leading up to the error, in the order they occurred.

 /usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_interface.py in plugin_create_network(self=<vnc_openstack.neutron_plugin_interface.NeutronPluginInterface object>, context={u'is_admin': False, u'operation': u'CREATE', u'roles': [u'_member_', u'Member'], u'tenant': u'4c935d93d292469c8fce8c40639f8705', u'tenant_id': u'4c935d93d292469c8fce8c40639f8705', u'type': u'network', u'user_id': u'b718482cfb314144894764a0dffd62e8'}, network={u'fields': None, u'filters': None, u'resource': {u'admin_state_up': True, u'contrail:policys': u'', u'name': u'net3', u'port_security_enabled': True, u'shared': False, u'tenant_id': u'4c935d93d292469c8fce8c40639f8705', u'vpc:route_table': u''}})
  134 try:
  135 cfgdb = self._get_user_cfgdb(context)
  136 net_info = cfgdb.network_create(network['resource'])
  137 return net_info
  138 except Exception as e:
net_info undefined
cfgdb = <vnc_openstack.neutron_plugin_db.DBInterface object>
cfgdb.network_create = <bound method DBInterface.network_create of <vnc_openstack.neutron_plugin_db.DBInterface object>>
network = {u'fields': None, u'filters': None, u'resource': {u'admin_state_up': True, u'contrail:policys': u'', u'name': u'net3', u'port_security_enabled': True, u'shared': False, u'tenant_id': u'4c935d93d292469c8fce8c40639f8705', u'vpc:route_table': u''}}

 /usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_db.py in network_create(self=<vnc_openstack.neutron_plugin_db.DBInterface object>, network_q={u'admin_state_up': True, u'contrail:policys': u'', u'name': u'net3', u'port_security_enabled': True, u'shared': False, u'tenant_id': u'4c935d93d292469c8fce8c40639f8705', u'vpc:route_table': u''})
 2262 net_obj = self._network_neutron_to_vnc(network_q, CREATE)
 2263 try:
 2264 net_uuid = self._resource_create('virtual_network', net_obj)
 2265 except RefsExistError:
 2266 self._raise_contrail_exception(400, exceptions.BadRequest(
net_uuid undefined
self = <vnc_openstack.neutron_plugin_db.DBInterface object>
self._resource_create = <bound method DBInterface._resource_create of <vnc_openstack.neutron_plugin_db.DBInterface object>>
net_obj = <vnc_api.gen.resource_client.VirtualNetwork object>

 /usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_db.py in _resource_create(self=<vnc_openstack.neutron_plugin_db.DBInterface object>, resource_type='virtual_network', obj=<vnc_api.gen.resource_client.VirtualNetwork object>)
  562 def _resource_create(self, resource_type, obj):
  563 try:
  564 obj_uuid = getattr(self._vnc_lib, resource_type + '_create')(obj)
  565 except RefsExistError:
  566 obj.uuid = str(uuid.uuid4())
obj_uuid undefined
builtingetattr = <built-in function getattr>
self = <vnc_openstack.neutron_plugin_db.DBInterface object>
self._vnc_lib = <vnc_api.vnc_api.VncApi object>
resource_type = 'virtual_network'
obj = <vnc_api.gen.resource_client.VirtualNetwork object>

 /usr/lib/python2.7/dist-packages/vnc_api/gen/vnc_api_client_gen.py in virtual_network_create(self=<vnc_api.vnc_api.VncApi object>, obj=<vnc_api.gen.resource_client.VirtualNetwork object>)
 4790 content = self._request_server(rest.OP_POST,
 4791 vnc_api.gen.resource_client.VirtualNetwork.create_uri,
 4792 data = json_body)
 4793
 4794 virtual_network_dict = json.loads(content)['virtual-network']
data undefined
json_body = '{"virtual-network":{"fq_name": ["default-domain"...ll}, "display_name": "net3", "is_shared": false}}'

 /usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py in _request_server(self=<vnc_api.vnc_api.VncApi object>, op=1, url=u'/virtual-networks', data='{"virtual-network":{"fq_name": ["default-domain"...ll}, "display_name": "net3", "is_shared": false}}', retry_on_error=True, retry_after_authn=False)
  365 continue
  366 else: # Unknown Error
  367 raise HttpError(status, content)
  368 # end while True
  369
global HttpError = <class 'cfgm_common.exceptions.HttpError'>
status = 500
content = u'Internal Server Error'
<class 'cfgm_common.exceptions.HttpError'>: HTTP Status: 500 Content: Internal Server Error
    __class__ = <class 'cfgm_common.exceptions.HttpError'>
    __delattr__ = <method-wrapper '__delattr__' of HttpError object>
    __dict__ = {'content': u'Internal Server Error', 'status_code': 500}
    __doc__ = None
    __format__ = <built-in method __format__ of HttpError object>
    __getattribute__ = <method-wrapper '__getattribute__' of HttpError object>
    __getitem__ = <method-wrapper '__getitem__' of HttpError object>
    __getslice__ = <method-wrapper '__getslice__' of HttpError object>
    __hash__ = <method-wrapper '__hash__' of HttpError object>
    __init__ = <bound method HttpError.__init__ of HttpError()>
    __module__ = 'cfgm_common.exceptions'
    __new__ = <built-in method __new__ of type object>
    __reduce__ = <built-in method __reduce__ of HttpError object>
    __reduce_ex__ = <built-in method __reduce_ex__ of HttpError object>
    __repr__ = <method-wrapper '__repr__' of HttpError object>
    __str__ = <bound method HttpError.__str__ of HttpError()>
    __subclasshook__ = <built-in method __subclasshook__ of type object>
    __unicode__ = <built-in method __unicode__ of HttpError object>
    __weakref__ = None
    args = ()
    content = u'Internal Server Error'
    message = ''
    status_code = 500

The above is a description of an error in a Python program. Here is
the original traceback:

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_interface.py", line 136, in plugin_create_network
    net_info = cfgdb.network_create(network['resource'])
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_db.py", line 2264, in network_create
    net_uuid = self._resource_create('virtual_network', net_obj)
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_db.py", line 564, in _resource_create
    obj_uuid = getattr(self._vnc_lib, resource_type + '_create')(obj)
  File "/usr/lib/python2.7/dist-packages/vnc_api/gen/vnc_api_client_gen.py", line 4792, in virtual_network_create
    data = json_body)
  File "/usr/lib/python2.7/dist-packages/vnc_api/vnc_api.py", line 367, in _request_server
    raise HttpError(status, content)
HttpError: HTTP Status: 500 Content: Internal Server Error

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/bottle.py", line 764, in _handle
    return route.call(**args)
  File "/usr/lib/python2.7/dist-packages/bottle.py", line 1575, in wrapper
    rv = callback(*a, **ka)
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_interface.py", line 211, in plugin_http_post_network
    return self.plugin_create_network(context, network)
  File "/usr/lib/python2.7/dist-packages/vnc_openstack/neutron_plugin_interface.py", line 140, in plugin_create_network
    raise e
HttpError: HTTP Status: 500 Content: Internal Server Error
10.204.216.47 - - [2014-09-01 00:55:04] "POST /neutron/network HTTP/1.1" 500 156 0.028547

[Sachin Bansal (sbansal)]

I tried on build 31 and it is working correctly for me:

root@a6s21:~# neutron net-create n3
400-{u'NeutronError': {u'message': u"[u'default-domain', u'admin', u'n3'] : quota limit (2) exceeded for resource virtual-network", u'type': u'ContrailBadRequestError', u'detail': u''}}

Please provide contrail-api-0.log if you are still seeing internal server error.