# Client.transport.sniff true NoNodeAvailableException

**URL:** <https://discuss.elastic.co/t/client-transport-sniff-true-nonodeavailableexception/86770>\
**Category:** Elasticsearch\
**Created:** [May 23, 2017, 7:14am UTC](https://discuss.elastic.co/t/client-transport-sniff-true-nonodeavailableexception/86770 "2017-05-23T07:14:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![hexian55](https://avatars.discourse-cdn.com/v4/letter/h/f07891/32.png) [@hexian55](https://discuss.elastic.co/u/hexian55)\
**Post date:** [May 23, 2017, 7:14am UTC](https://discuss.elastic.co/t/client-transport-sniff-true-nonodeavailableexception/86770/1 "2017-05-23T07:14:11Z")

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Hi  
I install the plugin x-pack , use java api connect cluster.  
when I set client.transport.sniff true in client, then return NoNodeAvailableException.  
but I remove this param,it's ok

like this  
Settings settings = Settings.builder()  
.put("[cluster.name](http://cluster.name)", cluster)  
.put("client.transport.sniff", true)  
.put("xpack.security.user", "transport\_client\_user:transport\_client\_user")  
.build();

why?  
es version is 5.4.0

---

<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:** [June 20, 2017, 7:14am UTC](https://discuss.elastic.co/t/client-transport-sniff-true-nonodeavailableexception/86770/2 "2017-06-20T07:14:18Z")

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