MetaData metaData = newMetaDataBuilder()
.put(newIndexMetaDataBuilder("test").numberOfShards(10).numberOfReplicas(1))
.build();
RoutingTable routingTable = routingTable()
.add(indexRoutingTable("test").initializeEmpty(metaData.index("test")))
.build();
ClusterState clusterState = newClusterStateBuilder().metaData(metaData).routingTable(routingTable).build();
logger.info("start one node, do reroute, only 3 should initialize");