Build#: Lithium-SR1 Build
Openstack: stable/kilo

local.conf snip
=======
enable_plugin networking-odl https://github.com/stackforge/networking-odl stable/kilo
Q_PLUGIN=ml2
ENABLE_TENANT_TUNNELS=True
Q_ML2_TENANT_NETWORK_TYPE=vxlan
PUBLIC_INTERFACE=em3
ODL_LOCAL_IP=20.1.1.3
disable_service q-l3
Q_L3_ENABLED=True
ODL_L3=True

ODL custom.properites
================
ovsdb.l3.fwd.enabled=yes

Environment
============
Openstack controller & 3 compute node(s) connected with ODL as external mode.

Problem:
========
Unresolved MAC Gateway error on karaf logs when unstack one of compute node instance in openstack side.However other compute nodes managed to reach external gateway and there is no functionalitywise impact.

This karaf logs mislead to end-user.
This error message goes-away until unstacked compute node to restacked!

Step to Recreate:
1.Disassociated floating IP,Deleted all VM's spawned on os-compute-1 node and unstacked
2.Only error seen in the karaf logs.however L3 & l2 flows worked in between another two compute in new & old VM's.
3.Untill restack and provision on VM with associate floating IP,this Unresolved MAC keeps on thrown on karaf logs.

--Attached relevant logs.
MAC_NOT_RESOLVED.txt -> during unstack of compute node
MAC_NOT_RESOLVED.txt -> during restack of compute node