IndexMetadata.builder("test_" + i)
                    .settings(Settings.builder().put("index.version.created", Version.CURRENT))
                    .numberOfShards(numShards)
                    .numberOfReplicas(numReplicas)
            );
        }
        Metadata metadata = mb.build();
        RoutingTable.Builder rb = RoutingTable.builder();
        for (int i = 1; i <= numIndices; i++) {