# Kv filter url parsing with dot inside field name

**URL:** https://discuss.elastic.co/t/kv-filter-url-parsing-with-dot-inside-field-name/49425
**Category:** Logstash
**Created:** [May 6, 2016, 5:29pm UTC](https://discuss.elastic.co/t/kv-filter-url-parsing-with-dot-inside-field-name/49425 "2016-05-06T17:29:21Z")
**Posts on this page:** 4
**Page:** 1

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### Author: ![jmduno](https://avatars.discourse-cdn.com/v4/letter/j/ac91a4/32.png) [@jmduno](https://discuss.elastic.co/u/jmduno)
#### Post date: [May 6, 2016, 5:29pm UTC](https://discuss.elastic.co/t/kv-filter-url-parsing-with-dot-inside-field-name/49425/1 "2016-05-06T17:29:22Z")

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Hello,

I am parsing url, and i have warning message :  
`Failed action. {:status=>400, :action=>["index", {:_id=>nil, :_index=>"logstash-2015.10.07", :_type=>"apache-access", :_routing=>nil}, 2015-10-07T13:12:35.000Z XXX1-L00359 10.20.30.40 - - [07/Oct/2015:15:12:35 +0200] "GET /application.jsp?mx.page.filter=null&dir=central], :response=>{"create"=>{"_index"=>"logstash-2015.10.07", "_type"=>"apache-access", "_id"=>"AVSHFrEu4TEJdwWGtIsO", "status"=>400, "error"=>{"type"=>"mapper_parsing_exception", "reason"=>"Field name [mx.page.filter] cannot contain '.'"}}}, :level=>:warn}`

To be able to create the field, Is there a way to replace the `.` dot by by an underscore `_` or to remove this character ?

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### Author: ![fbaligand](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/fbaligand/32/5657_2.png) [@fbaligand](https://discuss.elastic.co/u/fbaligand)
#### Post date: [May 6, 2016, 9:20pm UTC](https://discuss.elastic.co/t/kv-filter-url-parsing-with-dot-inside-field-name/49425/2 "2016-05-06T21:20:39Z")

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Just after your "kv" filter, I invite you to define "de\_dot" filter :

```
de_dot {
}

```

It will rename automatically all fields containing ".", replacing "." by "\_"

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<div class="post-metadata">

### Author: ![jmduno](https://avatars.discourse-cdn.com/v4/letter/j/ac91a4/32.png) [@jmduno](https://discuss.elastic.co/u/jmduno)
#### Post date: [May 9, 2016, 4:27am UTC](https://discuss.elastic.co/t/kv-filter-url-parsing-with-dot-inside-field-name/49425/3 "2016-05-09T04:27:43Z")

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Thanks !

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### Author: ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 4:58am UTC](https://discuss.elastic.co/t/kv-filter-url-parsing-with-dot-inside-field-name/49425/4 "2017-07-06T04:58:42Z")

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