# Custom analyzer doesn't work in mapping but is fine through index/\_analyze endpoint, ES v6.8.10
**URL:** https://discuss.elastic.co/t/custom-analyzer-doesnt-work-in-mapping-but-is-fine-through-index-analyze-endpoint-es-v6-8-10/280665
**Category:** Elasticsearch
**Created:** [August 6, 2021, 3:35pm UTC](https://discuss.elastic.co/t/custom-analyzer-doesnt-work-in-mapping-but-is-fine-through-index-analyze-endpoint-es-v6-8-10/280665 "2021-08-06T15:35:25Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@tehowe](https://discuss.elastic.co/u/tehowe)
#### Post date: [August 6, 2021, 3:35pm UTC](https://discuss.elastic.co/t/custom-analyzer-doesnt-work-in-mapping-but-is-fine-through-index-analyze-endpoint-es-v6-8-10/280665/1 "2021-08-06T15:35:25Z")
Why, if I've written an analyzer for Elasticsearch which works when I use the analysis API endpoint, does it not get picked up and used when I set the mapping for a field to that analyzer?
This works:
```auto
GET cobalt_strike/_analyze
{
"text": [
"gov.domain.org",
"mfa.gov.domain.org",
"justice.gov.domain.org"
],
"analyzer": "domain_name_analyzer"
}
```
This doesn't:
```auto
"host_domains" : {
"type" : "text",
"analyzer" : "domain_name_analyzer"
},
```
What am I doing wrong? Thanks.
---
### Author:  [@tehowe](https://discuss.elastic.co/u/tehowe)
#### Post date: [August 9, 2021, 8:49pm UTC](https://discuss.elastic.co/t/custom-analyzer-doesnt-work-in-mapping-but-is-fine-through-index-analyze-endpoint-es-v6-8-10/280665/2 "2021-08-09T20:49:26Z")
Ok for future reference (and I wish this was more evident from the documentation), analyzer works in searching ONLY it does not modify the document being stored. So you'll never see a change in Kibana showing the stored tokens and you can't see the tokens created directly other than when using the \_analyzer endpoint.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [September 6, 2021, 8:50pm UTC](https://discuss.elastic.co/t/custom-analyzer-doesnt-work-in-mapping-but-is-fine-through-index-analyze-endpoint-es-v6-8-10/280665/3 "2021-09-06T20:50:18Z")
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