Caused by: java.net.SocketTimeoutException: 30,000 milliseconds timeout on elasticsearch 超时问题

   /**
    * 查询所有酒店信息
    */
   List<TabHotel> records= tabHotelMapper.getHotelList();
   System.out.println("酒店数据"+records);
   //将数据保存带es中
   //1 给es中建立索引 product 建立好映射关系
   //2 保存数据到es中
   BulkRequest bulkRequest = new BulkRequest();
   for (TabHotel skuEsModel : records) {
       //放到哪个索引?
       IndexRequest indexRequest = new IndexRequest("travel_hotel");
       indexRequest.id(skuEsModel.getId());
       String jsonString = JSON.toJSONString(skuEsModel);
       indexRequest.source(jsonString, XContentType.JSON);
       bulkRequest.add(indexRequest);
   }
   System.out.println("酒店数据ser"+bulkRequest);
   //执行
   BulkResponse bulk = restHighLevelClient.bulk(bulkRequest, ElasticSearchConfig.COMMON_OPTIONS);

   //TODO 如果批量错误
   boolean b = bulk.hasFailures();
   List<String> collect = Arrays.stream(bulk.getItems()).map(item -> {
       return item.getId();
   }).collect(Collectors.toList());
   log.info("酒店信息上传完成：{}，返回数据:{}", collect, bulk.toString());
   System.out.println(b);
}

 在elasticsearch 的config/elasticsearch.yml 下 添加 cluster.initial_master_nodes: [“127.0.0.1:9200”] 后重新启动，问题解决。