@Override public void handleRequest( final RestRequest request, final RestChannel channel, final Client client) { ClusterStatsRequest clusterStatsRequest = new ClusterStatsRequest().nodesIds(request.paramAsStringArray("nodeId", null)); clusterStatsRequest.timeout(request.param("timeout")); client .admin() .cluster() .clusterStats(clusterStatsRequest, new RestToXContentListener<>(channel)); }