Description of problem:
UPI on aws with 4 nodes, met sdn pod crashed with following error: 

I0914 11:25:26.790758 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)


Version-Release number of selected component (if applicable):
4.6.0-0.nightly-2020-09-12-230035

How reproducible:


Steps to Reproduce:
1. 
2.
3.

Actual results:
 oc logs sdn-gpvvp -n openshift-sdn -c sdn
I0914 11:25:26.665266 1651659 cmd.go:121] Reading proxy configuration from /config/kube-proxy-config.yaml
I0914 11:25:26.666379 1651659 feature_gate.go:243] feature gates: &{map[]}
I0914 11:25:26.666421 1651659 cmd.go:216] Watching config file /config/kube-proxy-config.yaml for changes
I0914 11:25:26.666455 1651659 cmd.go:216] Watching config file /config/..2020_09_14_11_10_59.920273164/kube-proxy-config.yaml for changes
I0914 11:25:26.692552 1651659 node.go:150] Initializing SDN node "ip-10-0-54-32.us-east-2.compute.internal" (10.0.54.32) of type "redhat/openshift-ovs-networkpolicy"
I0914 11:25:26.696419 1651659 cmd.go:159] Starting node networking (v0.0.0-alpha.0-201-g79fd230c)
I0914 11:25:26.696434 1651659 node.go:338] Starting openshift-sdn network plugin
I0914 11:25:26.790758 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:25:27.294809 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:25:27.924311 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:25:28.709851 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:25:29.690655 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:25:30.915621 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:25:32.445503 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:25:34.356446 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:25:36.744748 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:25:39.729168 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:25:39.729195 1651659 sdn_controller.go:139] [SDN setup] full SDN setup required (plugin is not setup)
I0914 11:26:09.735482 1651659 ovs.go:180] Error executing ovs-vsctl: 2020-09-14T11:26:09Z|00002|fatal_signal|WARN|terminating with signal 14 (Alarm clock)
I0914 11:26:40.275031 1651659 ovs.go:180] Error executing ovs-vsctl: 2020-09-14T11:26:40Z|00002|fatal_signal|WARN|terminating with signal 14 (Alarm clock)
I0914 11:26:40.783923 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:26:41.287895 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:26:41.916786 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:26:42.702013 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:26:43.682345 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:26:44.907001 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:26:46.437090 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:26:48.348352 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:26:50.736413 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
I0914 11:26:53.720837 1651659 ovs.go:180] Error executing ovs-ofctl: ovs-ofctl: /var/run/openvswitch/br0.mgmt: failed to open socket (Connection refused)
F0914 11:26:53.720882 1651659 cmd.go:111] Failed to start sdn: node SDN setup failed: timed out waiting for the condition


Expected results:


Additional info: