# Facing issue in Discover in kibana while accessing index

**URL:** <https://discuss.elastic.co/t/facing-issue-in-discover-in-kibana-while-accessing-index/241152>\
**Category:** Kibana\
**Created:** [July 14, 2020, 3:08pm UTC](https://discuss.elastic.co/t/facing-issue-in-discover-in-kibana-while-accessing-index/241152 "2020-07-14T15:08:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![adkalavadia](https://avatars.discourse-cdn.com/v4/letter/a/6a8cbe/32.png) [@adkalavadia](https://discuss.elastic.co/u/adkalavadia)\
**Post date:** [July 14, 2020, 3:08pm UTC](https://discuss.elastic.co/t/facing-issue-in-discover-in-kibana-while-accessing-index/241152/1 "2020-07-14T15:08:48Z")

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Getting below error in discover window while accessing index.

[illegal\_argument\_exception] Text fields are not optimised for operations that require per-document field data like aggregations and sorting, so these operations are disabled by default. Please use a keyword field instead. Alternatively, set fielddata=true on [doc.Body.UserAccountData.UserAccountStringData.KycDetail.BUSINESS\_DETAILS\_-\_A/M/T\_KYC.DATE\_OF\_SIGN\_UP] in order to load field data by uninverting the inverted index. Note that this can use significant memory.

In ElasticSearch, Field has data as shown below and Date type is Date.

```auto
"DATE_OF_SIGN_UP" : "2020-06-16T21:00:00.000Z"

```

ElasticSearch 7.8.0  
Kibana 7.8.0

Can anyone help on this ?

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<div class="post-metadata">

**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\
**Post date:** [July 15, 2020, 1:49am UTC](https://discuss.elastic.co/t/facing-issue-in-discover-in-kibana-while-accessing-index/241152/2 "2020-07-15T01:49:50Z")

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Welcome to our community! 😃

What does the `_mapping` for that field show?

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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:** [August 12, 2020, 1:49am UTC](https://discuss.elastic.co/t/facing-issue-in-discover-in-kibana-while-accessing-index/241152/3 "2020-08-12T01:49:53Z")

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