# Sniffing using HighLevelClient in Java

**URL:** <https://discuss.elastic.co/t/sniffing-using-highlevelclient-in-java/157557>\
**Category:** Elasticsearch\
**Created:** [November 20, 2018, 1:20pm UTC](https://discuss.elastic.co/t/sniffing-using-highlevelclient-in-java/157557 "2018-11-20T13:20:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![pr\_daniel](https://avatars.discourse-cdn.com/v4/letter/p/a9adbd/32.png) [@pr\_daniel](https://discuss.elastic.co/u/pr_daniel)\
**Post date:** [November 20, 2018, 1:20pm UTC](https://discuss.elastic.co/t/sniffing-using-highlevelclient-in-java/157557/1 "2018-11-20T13:20:30Z")

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How am I supposed to create a high level rest client with sniffing enabled (6.4.3)? The components (sniffer, listener, clients) depend on each other in such a way it seems impossible.

Here the HighLevelClient takes a builder, but I need to build the low level client to activate sniffing!?

....  
final RestClientBuilder clientBuilder = RestClient.builder(hosts.toArray(new HttpHost[0]));

final RestHighLevelClient highLevelClient = new RestHighLevelClient(clientBuilder); // will build the client !

if (config.sniffEsCluster()) {  
 final SniffOnFailureListener failureListener = new SniffOnFailureListener();

sniffer = Sniffer.builder(highLevelClient.getLowLevelClient())  
 .setSniffAfterFailureDelayMillis((int) Duration.ofSeconds(30).toMillis())  
 .setSniffIntervalMillis((int) Duration.ofMinutes(1).toMillis())  
 .build();

clientBuilder.setFailureListener(failureListener); // builder closed !?  
 failureListener.setSniffer(sniffer);  
}  
....

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [December 18, 2018, 1:20pm UTC](https://discuss.elastic.co/t/sniffing-using-highlevelclient-in-java/157557/2 "2018-12-18T13:20:31Z")

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