# Field name beat unknown in elasicseach

**URL:** <https://discuss.elastic.co/t/field-name-beat-unknown-in-elasicseach/159688>\
**Category:** Elasticsearch\
**Created:** [December 6, 2018, 9:00am UTC](https://discuss.elastic.co/t/field-name-beat-unknown-in-elasicseach/159688 "2018-12-06T09:00:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rijinmp](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rijinmp/32/24634_2.png) [@rijinmp](https://discuss.elastic.co/u/rijinmp)\
**Post date:** [December 6, 2018, 9:00am UTC](https://discuss.elastic.co/t/field-name-beat-unknown-in-elasicseach/159688/1 "2018-12-06T09:00:59Z")

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Hi All ,

5 node elasticsearch is running(6.5.1) . TLS is enabled in ES.  
File beat(6.4) sending json logs to Logstash(6.5.1) . Logstash is indexing ( default mapping) to ES.  
in elasicsearch some fileds are showing unknown . See through kibana. These fileds are generated by beat and logstash . Not in the log file.

Sample:  
? beat {  
"hostname": "xyz",  
"version": "6.4.2",  
"name": "xyz"  
}  
? host {  
"name": "xyz"  
}  
? index {  
"\_index": "server-metrics",  
"\_id": "46429",  
"\_type": "metric"  
}  
? input {  
"type": "log"  
}

? beat = unknown  
? host = unknown  
? index = unknown  
? input = unknown

---

<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:** [January 3, 2019, 9:01am UTC](https://discuss.elastic.co/t/field-name-beat-unknown-in-elasicseach/159688/2 "2019-01-03T09:01:09Z")

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