Created a NetVirt cluster (ODL1,ODL2,ODL3) Configured the Openstack Control and Compute nodes to send neutron requests to ODL1, The ODL2 and ODL3 set
as OVS Managers

local.conf (control node): https://gist.github.com/gvranganvtn/4c498ff24d3aa2a95693

local.conf (compute node):
https://gist.github.com/gvranganvtn/9be5ae6c385aeac5abef

ubuntu@odl-os-control-node:~/devstack$ sudo ovs-vsctl show
7379aa64-0416-45e2-9531-351397cc742a
Manager "tcp:11.12.13.5:6640"
Manager "tcp:11.12.13.4:6640"
is_connected: true
Bridge br-ex
Controller "tcp:11.12.13.4:6653"
is_connected: true
Controller "tcp:11.12.13.5:6653"
fail_mode: secure
Port br-ex
Interface br-ex
type: internal
Port "eth2"
Interface "eth2"
Bridge br-int
Controller "tcp:11.12.13.4:6653"
is_connected: true
Controller "tcp:11.12.13.5:6653"
fail_mode: secure
Port "tap76ec97f0-cf"
Interface "tap76ec97f0-cf"
type: internal
Port "tap6205c62f-88"
Interface "tap6205c62f-88"
Port br-int
Interface br-int
type: internal
ovs_version: "2.3.2"

Compute node:

ubuntu@odl-os-compute-node:~$ sudo ovs-vsctl show
bf460c25-5849-4874-9758-4fcbafbf9f5e
Manager "tcp:11.12.13.4:6640"
is_connected: true
Manager "tcp:11.12.13.5:6640"
is_connected: true
Bridge br-ex
Controller "tcp:11.12.13.4:6653"
is_connected: true
Controller "tcp:11.12.13.5:6653"
is_connected: true
Port "eth2"
Interface "eth2"
Port br-ex
Interface br-ex
type: internal
Bridge br-int
Controller "tcp:11.12.13.4:6653"
is_connected: true
Controller "tcp:11.12.13.5:6653"
is_connected: true
Port "tapc3170fef-e6"
Interface "tapc3170fef-e6"
Port br-int
Interface br-int
type: internal
ovs_version: "2.3.2"

Created a Network and two instances.
No flows are installed.

Erros in Karaf log in ODL2 and ODL3

ODL2 Karaf Exception: https://gist.github.com/gvranganvtn/d45d7f538ae66f6b8615

ODL3 Karaf exception:
https://gist.github.com/gvranganvtn/9b439346950307546b5b

ODL1 did not display any exception .