# Field name cannot contain '.'

**URL:** https://discuss.elastic.co/t/field-name-cannot-contain/33251
**Category:** Logstash
**Created:** [October 29, 2015, 2:05pm UTC](https://discuss.elastic.co/t/field-name-cannot-contain/33251 "2015-10-29T14:05:04Z")
**Posts on this page:** 1
**Showing post:** 2

<div class="post-metadata">

### Author: ![radu.stefanache](https://avatars.discourse-cdn.com/v4/letter/r/dbc845/32.png) [@radu.stefanache](https://discuss.elastic.co/u/radu.stefanache)
#### Post date: [October 29, 2015, 3:00pm UTC](https://discuss.elastic.co/t/field-name-cannot-contain/33251/2 "2015-10-29T15:00:24Z")

</div>

I've been looking in the logs more and I see that any field that contains a dot in the name is not parsed :

```
MapperParsingException[Field name [elapsed.time] cannot contain '.']

```

Is there anything I can do from logstash or this is up to the mapping of the index ?

---

_[View the full topic](https://discuss.elastic.co/t/field-name-cannot-contain/33251)._