Good catch. This was a result of the "Don't unnecessarily loop through all
ports/interfaces" patch.[1]
Passing a list of names to "ovs-vsctl list Interface" with an element that
doesn't match an existing port causes an error.[2] This happens when a port
is deleted right after the list of interface
https://bugs.launchpad.net/neutron/+bug/1407190
Looks like this started on 12/29. I checked the neutron commits around
that time and there are some related to ports/interfaces and openvswitch
but I'm not sure that they contributing to this issue.
I've put a bunch of notes and log links in th
