es 配置

官网信息 https://www.elastic.co/guide/en/elasticsearch/hadoop/master/configuration.html

es.nodes.wan.only (default false)

Whether the connector is used against an Elasticsearch instance in a cloud/restricted environment over the WAN, such as Amazon Web Services. In this mode, the connector disables discovery and onlyconnects through the declared es.nodes during all operations, including reads and writes. Note that in this mode, performance is highly affected.