# Issues with kv filtering/ElasticSearch filtering

**URL:** <https://discuss.elastic.co/t/issues-with-kv-filtering-elasticsearch-filtering/194019>\
**Category:** Logstash\
**Created:** [August 6, 2019, 1:26pm UTC](https://discuss.elastic.co/t/issues-with-kv-filtering-elasticsearch-filtering/194019 "2019-08-06T13:26:04Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![jshepheard](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@jshepheard](https://discuss.elastic.co/u/jshepheard)\
**Post date:** [August 6, 2019, 1:26pm UTC](https://discuss.elastic.co/t/issues-with-kv-filtering-elasticsearch-filtering/194019/1 "2019-08-06T13:26:04Z")

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Hello.  
I am having a strange issue with ELK stack which I am struggling to get my head around. (ElasticSearch 6.5).

My logstash config contains:

```auto
kv {
 field_split => ", "
 value_split => "="
}

```

which is working fine, however, one field which has a space in it isn't quite working correctly.

an example message (unfiltered) contains `device=First Second` (data sanatized) - but in the filtered field of `device`, it shows as `device=First` and hasn't got the second part of the string.

The mapping type for this field in paticular is:

```auto
       "device" : {
           "type" : "keyword"
         },

```

So I believe that is correct. Can anybody help?  
Thank you in advance.

---

<div class="post-metadata">

**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [August 6, 2019, 1:44pm UTC](https://discuss.elastic.co/t/issues-with-kv-filtering-elasticsearch-filtering/194019/2 "2019-08-06T13:44:28Z")

</div>

> [@jshepheard](#):
>
> ```
> field_split => ", "
> 
> ```

So fields are separated by either comma or space, which means Second is a field with no value, so it does not get stored.

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<div class="post-metadata">

**Author:** ![jshepheard](https://avatars.discourse-cdn.com/v4/letter/j/ad7895/32.png) [@jshepheard](https://discuss.elastic.co/u/jshepheard)\
**Post date:** [August 7, 2019, 6:04am UTC](https://discuss.elastic.co/t/issues-with-kv-filtering-elasticsearch-filtering/194019/3 "2019-08-07T06:04:46Z")

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Thank you @Badger.

I did some more investigation and noted that the fields are splitting on both ", " or " " or ",".

Do you know of a way I can explicitly say, only split on ", "?

Thank you in advance.

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<div class="post-metadata">

**Author:** ![Jenni](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/jenni/32/29684_2.png) [@Jenni](https://discuss.elastic.co/u/Jenni)\
**Post date:** [August 7, 2019, 9:18am UTC](https://discuss.elastic.co/t/issues-with-kv-filtering-elasticsearch-filtering/194019/4 "2019-08-07T09:18:06Z")

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You need to change field\_split to field\_split\_pattern.  
[https://www.elastic.co/guide/en/logstash/current/plugins-filters-kv.html#plugins-filters-kv-field\_split\_pattern](https://www.elastic.co/guide/en/logstash/current/plugins-filters-kv.html#plugins-filters-kv-field_split_pattern)

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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:** [September 4, 2019, 9:18am UTC](https://discuss.elastic.co/t/issues-with-kv-filtering-elasticsearch-filtering/194019/5 "2019-09-04T09:18:13Z")

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