We have a following scenario in the following collection where ODL tries to configure two VPP VMs:
https://www.getpostman.com/collections/5c0d1e8b743168b81a67

1) PUT define mount points
2) GET see if MPs are connected
3) PUT network-topology initial configuration input
3) PUT neutron data for GBP - forwarding and policy
4) PUT neutron data for GBP - forwarding and policy + 2 ports (in VLAN bridge domain)
so far so good, the next step is problematic
5) PUT neutron data for GBP - forwarding and policy + 2 ports + 2ports in VLAN + 2 ports in VXLAN bridge domain

At this point, VXLAN bridge domain and a tunnel should be created.

Please see the log for the error message. When the error happens, VXLAN tunnel is not created. Everything else seems to be configured on VPP.
Note: interface 7 belonged to vHostUser on Gigabitethernet0/0/0

To replicate, download this patch. https://git.opendaylight.org/gerrit/#/c/40935/, which we need for syncing netconf communication and it's also patch under which the error is visible.

feature:install odl-vbd-ui odl-groupbasedpolicy-neutron-vpp-mapper odl-restconf