When adding PUBLIC_INTERFACE in local.conf and stacking, we see that eth2 is added to br-ex as expeted, but karaf log prints repeted exceptio n s for External Interface

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ubuntu@odl-os-control-node:~/devstack$ sudo ovs-vsctl show
7379aa64-0416-45e2-9531-351397cc742a
Manager "tcp:11.12.13.2:6640"
is_connected: true
Manager "tcp:11.12.13.3:6640"
is_connected: true
Bridge br-ex
Controller "tcp:11.12.13.2:6653"
is_connected: true
Controller "tcp:11.12.13.3:6653"
is_connected: true
fail_mode: secure
Port patch-int
Interface patch-int
type: patch
options:

{peer=patch-ext}

Port br-ex
Interface br-ex
type: internal
Port "eth2"
Interface "eth2"
Bridge br-int
Controller "tcp:11.12.13.3:6653"
is_connected: true
Controller "tcp:11.12.13.2:6653"
is_connected: true
fail_mode: secure
Port "tap18c818c4-5c"
Interface "tap18c818c4-5c"
Port "tap97b23751-88"
Interface "tap97b23751-88"
type: internal
Port patch-ext
Interface patch-ext
type: patch
options:

{peer=patch-int}

Port "tap8e197549-ff"
Interface "tap8e197549-ff"
type: internal
Port "vxlan-12.14.16.2"
Interface "vxlan-12.14.16.2"
type: vxlan
options:

{key=flow, local_ip="12.14.16.1", remote_ip="12.14.16.2"}

Port "tapebaa3d7c-55"
Interface "tapebaa3d7c-55"
Port br-int
Interface br-int
type: internal
ovs_version: "2.3.2"
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2016-01-20 18:47:35,470 | ERROR | ntDispatcherImpl | BridgeConfigurationManagerImpl | 281 - org.opendaylight.ovsdb.openstack.net-virt - 1.2.1.SNAPSHOT | External interface not found for Node: Node{getNodeId=Uri [_value=ovsdb://uuid/7379aa64-0416-45e2-9531-351397cc742a/bridge/br-ex], getTerminationPoint=[TerminationPoint{getTpId=Uri [_value=eth2], augmentations={interface org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbTerminationPointAugmentation=OvsdbTerminationPointAugmentation

{getInterfaceUuid=Uuid [_value=2b4ce7ae-5367-4363-b9b5-1c20be53459b], getName=eth2, getOfport=1, getPortUuid=Uuid [_value=a7f09e4d-6807-4eea-b9cc-63dbc587b70a]}

}}, TerminationPoint{getTpId=Uri [_value=br-ex], augmentations={interface org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbTerminationPointAugmentation=OvsdbTerminationPointAugmentation

{getInterfaceType=class org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.InterfaceTypeInternal, getInterfaceUuid=Uuid [_value=fec8a129-24b8-473f-8f76-555684c16a0f], getName=br-ex, getOfport=65534, getPortUuid=Uuid [_value=7b88269f-c6ca-4915-be17-fca10b2964f8]}

}}, TerminationPoint{getTpId=Uri [_value=patch-int], augmentations={interface org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbTerminationPointAugmentation=OvsdbTerminationPointAugmentation{getInterfaceType=class org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.InterfaceTypePatch, getInterfaceUuid=Uuid [_value=66097575-63b4-4fca-8062-bede1d274203], getName=patch-int, getOfport=2, getOptions=[Options{getOption=peer, getValue=patch-ext, augmentations={}}], getPortExternalIds=[PortExternalIds{getExternalIdKey=opendaylight-iid, getExternalIdValue=/network-topology:network-topology/network-topology:topology[network-topology:topology-id='ovsdb:1']/network-topology:node[network-topology:node-id='ovsdb://uuid/7379aa64-0416-45e2-9531-351397cc742a/bridge/br-ex']/network-topology:termination-point[network-topology:tp-id='patch-int'], augmentations={}}], getPortUuid=Uuid [_value=0f86b07a-1736-4138-8de7-b845da19018e]}}}], augmentations={interface org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbBridgeAugmentation=OvsdbBridgeAugmentation{getBridgeExternalIds=[BridgeExternalIds{getBridgeExte