GBP Ext-Seg: L3Policy cannot be updated to a new Ext-Seg

Updating external-segment attribute of the L3Policy fails(post-commit)
Steps:
1. Create L3Policy with reference to an external-segment
2. Create a new Ext-Seg
3. Update the L3Policy to the new Ext-Seg(from Step 2)

[root@f3-controller ~(keystone_admin)]# gbp l3policy-show L3P2
+----------------------+---------------------------------------------------------+
| Field | Value |
+----------------------+---------------------------------------------------------+
| description | |
| external_segments | {"d1bc7d4b-664d-434c-9fc1-4b09edf3dcbe": ["1.102.1.7"]} |
| id | d8d3527b-4246-45e3-bc4d-ba223893180d |
| ip_pool | 40.40.0.0/16 |
| ip_version | 4 |
| l2_policies | |
| name | L3P2 |
| routers | d71456e8-224c-4d73-9f34-407322a2b266 |
| shared | False |
| subnet_prefix_length | 24 |
| tenant_id | 4c4227827cce441481b041657d1a1595 |
+----------------------+---------------------------------------------------------+
[root@f3-controller ~(keystone_admin)]#
[root@f3-controller ~(keystone_admin)]# gbp external-segment-list
+--------------------------------------+---------+-------------+----------------+-----------------+--------------------------+--------+
| id | name | description | cidr | external_routes | port_address_translation | shared |
+--------------------------------------+---------+-------------+----------------+-----------------+--------------------------+--------+
| d1bc7d4b-664d-434c-9fc1-4b09edf3dcbe | MgmtOut | | 1.102.1.254/24 | | False | False |
| f618fed2-6da5-49f5-bea6-e8306237fa88 | DataOut | | 1.102.2.254/24 | | False | False |
+--------------------------------------+---------+-------------+----------------+-----------------+--------------------------+--------+
[root@f3-controller ~(keystone_admin)]#
[root@f3-controller ~(keystone_admin)]# gbp l3policy-update L3P2 --external-segment f618fed2-6da5-49f5-bea6-e8306237fa88=
Internal Server Error (HTTP 500) (Request-ID: req-869807ce-f127-4a1f-a3f1-a1b7307d9615)
[root@f3-controller ~(keystone_admin)]#
[root@f3-controller ~(keystone_admin)]# gbp l3policy-show L3P2
+----------------------+------------------------------------------------+
| Field | Value |
+----------------------+------------------------------------------------+
| description | |
| external_segments | {"f618fed2-6da5-49f5-bea6-e8306237fa88": [""]} |
| id | d8d3527b-4246-45e3-bc4d-ba223893180d |
| ip_pool | 40.40.0.0/16 |
| ip_version | 4 |
| l2_policies | |
| name | L3P2 |
| routers | 3c3f1e37-2b69-4926-8815-10a0e958386e |
| shared | False |
| subnet_prefix_length | 24 |
| tenant_id | 4c4227827cce441481b041657d1a1595 |
+----------------------+------------------------------------------------+
[root@f3-controller ~(keystone_admin)]#
2015-08-19 13:41:20.742 18183 DEBUG gbpservice.neutron.db.grouppolicy.group_policy_mapping_db [req-869807ce-f127-4a1f-a3f1-a1b7307d9615 None] gbpservice.neutron.services.grouppolicy.plugin.GroupPolicyPlugin method get_external_segments called with arguments (<neutron.context.Context object at 0x6012950>, {'id': set([u'f618fed2-6da5-49f5-bea6-e8306237fa88'])}, None, None, None, None, False) {} wrapper /usr/lib/python2.7/site-packages/neutron/common/log.py:33
2015-08-19 13:41:20.758 18183 DEBUG gbpservice.neutron.db.grouppolicy.group_policy_mapping_db [req-869807ce-f127-4a1f-a3f1-a1b7307d9615 None] gbpservice.neutron.services.grouppolicy.plugin.GroupPolicyPlugin method get_external_segments called with arguments (<neutron.context.Context object at 0x6012950>, {'id': [u'f618fed2-6da5-49f5-bea6-e8306237fa88']}, None, None, None, None, False) {} wrapper /usr/lib/python2.7/site-packages/neutron/common/log.py:33
2015-08-19 13:41:20.858 18183 ERROR gbpservice.neutron.services.grouppolicy.policy_driver_manager [req-869807ce-f127-4a1f-a3f1-a1b7307d9615 None] Policy driver 'apic' failed in update_l3_policy_postcommit
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager Traceback (most recent call last):
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager File "/usr/lib/python2.7/site-packages/gbpservice/neutron/services/grouppolicy/policy_driver_manager.py", line 119, in _call_on_drivers
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager getattr(driver.obj, method_name)(context)
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager File "/usr/lib/python2.7/site-packages/gbpservice/neutron/services/grouppolicy/drivers/cisco/apic/apic_mapping.py", line 641, in update_l3_policy_postcommit
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager self._create_and_plug_router_to_es(context, new_segment_dict)
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager File "/usr/lib/python2.7/site-packages/gbpservice/neutron/services/grouppolicy/drivers/cisco/apic/apic_mapping.py", line 1717, in _create_and_plug_router_to_es
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager context._plugin_context, router_id, interface_info)
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager File "/usr/lib/python2.7/site-packages/gbpservice/neutron/services/grouppolicy/drivers/resource_mapping.py", line 1824, in _add_router_gw_interface
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager {'router': {'external_gateway_info': gw_info}})
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager File "/usr/lib/python2.7/site-packages/neutron/db/extraroute_db.py", line 75, in update_router
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager context, id, router)
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager File "/usr/lib/python2.7/site-packages/neutron/db/l3_db.py", line 1122, in update_router
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager id, router)
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager File "/usr/lib/python2.7/site-packages/neutron/db/l3_db.py", line 188, in update_router
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager context, id, gw_info)
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager File "/usr/lib/python2.7/site-packages/neutron/db/l3_db.py", line 263, in _check_router_needs_rescheduling
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager raise n_exc.BadRequest(resource='router', msg=msg)
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager BadRequest: Bad router request: No eligible l3 agent associated with external network c4f25d88-909f-4122-b820-51820ebc1b60 found
2015-08-19 13:41:20.858 18183 TRACE gbpservice.neutron.services.grouppolicy.policy_driver_manager
2015-08-19 13:41:20.860 18183 ERROR neutron.api.v2.resource [req-869807ce-f127-4a1f-a3f1-a1b7307d9615 None] update failed
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource Traceback (most recent call last):
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource Traceback (most recent call last):
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/api/v2/resource.py", line 87, in resource
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource result = method(request=request, **args)
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/api/v2/base.py", line 538, in update
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource obj = obj_updater(request.context, id, **kwargs)
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/neutron/common/log.py", line 34, in wrapper
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource return method(*args, **kwargs)
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/gbpservice/neutron/services/grouppolicy/plugin.py", line 780, in update_l3_policy
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource policy_context)
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/gbpservice/neutron/services/grouppolicy/policy_driver_manager.py", line 204, in update_l3_policy_postcommit
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource self._call_on_drivers("update_l3_policy_postcommit", context)
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource File "/usr/lib/python2.7/site-packages/gbpservice/neutron/services/grouppolicy/policy_driver_manager.py", line 134, in _call_on_drivers
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource method=method_name
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource GroupPolicyDriverError: update_l3_policy_postcommit failed.
2015-08-19 13:41:20.860 18183 TRACE neutron.api.v2.resource
2015-08-19 13:41:20.862 18183 INFO neutron.wsgi [req-869807ce-f127-4a1f-a3f1-a1b7307d9615 None] 172.28.184.45 - - [19/Aug/2015 13:41:20] "PUT /v2.0/grouppolicy/l3_policies/d8d3527b-4246-45e3-bc4d-ba223893180d.json HTTP/1.1" 500 325 0.508825