Comment 3 for bug 1813705

Paste some logs:
2019-02-20 11:00:41.944 2268474 WARNING ovsdbapp.backend.ovs_idl.vlog [-] tcp:127.0.0.1:6640: send error: Broken pipe 2019-02-20 11:00:41.968 2268474 WARNING ovsdbapp.backend.ovs_idl.vlog [-] tcp:127.0.0.1:6640: connection dropped (Broken pipe)
2019-02-20 11:01:46.027 2268474 ERROR neutron.agent.linux.async_process [-] Error received from [ovsdb-client monitor tcp:127.0.0.1:6640 Interface name,ofport,external_ids --format=json]: None
2019-02-20 11:01:47.331 2268474 ERROR neutron.agent.linux.async_process [-] Process [ovsdb-client monitor tcp:127.0.0.1:6640 Interface name,ofport,external_ids --format=json] dies due to the error: None