more locking

northbound/server.go

@@ -115,6 +115,8 @@ func fillOnds(pnd nucleus.PrincipalNetworkDomain) (*ppb.OrchestratedNetworkingDe
 
 func fillSbis(pnd nucleus.PrincipalNetworkDomain) (*ppb.SouthboundInterfaces, error) {
 	sbis := make(map[string]*ppb.SouthboundInterface)
+	sbiLock.RLock()
+	defer sbiLock.RUnlock()
 	sbic := pnd.GetSBIs().(*nucleus.SbiStore)
 	for _,id := range sbic.UUIDs() {
 		sbi, err := sbic.Get(id)