desiam commented on issue #7861: [FLINK-11747] [ Connectors / ElasticSearch] Expose RestHighLevelClient to allow for custom sniffing URL: https://github.com/apache/flink/pull/7861#issuecomment-468543014 @tzulitai From https://www.elastic.co/guide/en/elasticsearch/client/java-rest/master/_usage.html, you generally need a reference to the low-level rest client when initializing the sniffer, which can be obtained from the high level rest client. Some additional context in [FLINK-11747](https://issues.apache.org/jira/browse/FLINK-11747)
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