sets.InsertOrNew(serviceClusters, string(svcHost), cluster)
			} else {
				sets.InsertOrNew(subsetClusters, string(svcHost), cluster)
			}
			if servicePortClusters[string(svcHost)] == nil {
				servicePortClusters[string(svcHost)] = make(map[int]string)
			}
			servicePortClusters[string(svcHost)][port] = cluster
		}
	}

	for key := range updates.ConfigsUpdated {
		// deleted clusters for this config.