# Error Discover:\[number\_format\_exception\] empty String

**URL:** https://discuss.elastic.co/t/error-discover-number-format-exception-empty-string/124068
**Category:** Kibana
**Created:** [March 15, 2018, 10:16am UTC](https://discuss.elastic.co/t/error-discover-number-format-exception-empty-string/124068 "2018-03-15T10:16:49Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![Bill\_McConaghy](https://avatars.discourse-cdn.com/v4/letter/b/ed655f/32.png) [@Bill\_McConaghy](https://discuss.elastic.co/u/Bill_McConaghy)
#### Post date: [March 15, 2018, 12:40pm UTC](https://discuss.elastic.co/t/error-discover-number-format-exception-empty-string/124068/6 "2018-03-15T12:40:49Z")

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I think the issue may be with the data and mapping in your index. I think that a field that is mapped as a number type in Elasticsearch has some values that are just "" instead of a number. See this post for possible resolutions: [Number format Exception For string type](https://discuss.elastic.co/t/number-format-exception-for-string-type/59175)

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