private static class NoopGatewayAllocator extends GatewayAllocator {
        public static final NoopGatewayAllocator INSTANCE = new NoopGatewayAllocator();

        @Override
        public void applyStartedShards(List<ShardRouting> startedShards, RoutingAllocation allocation) {
            // noop
        }

        @Override
        public void applyFailedShards(List<FailedShard> failedShards, RoutingAllocation allocation) {

    public ClusterState measureAllocation() {
        ClusterState clusterState = initialClusterState;
        while (clusterState.getRoutingNodes().hasUnassignedShards()) {
            clusterState = strategy.applyStartedShards(
                clusterState,
                clusterState.getRoutingNodes().shardsWithState(ShardRoutingState.INITIALIZING)
            );
            clusterState = strategy.reroute(clusterState, "reroute");