# Provided Grok expressions do not match field value:

**URL:** <https://discuss.elastic.co/t/provided-grok-expressions-do-not-match-field-value/260472>\
**Category:** Beats\
**Tags:** filebeat\
**Created:** [January 7, 2021, 5:24pm UTC](https://discuss.elastic.co/t/provided-grok-expressions-do-not-match-field-value/260472 "2021-01-07T17:24:29Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![millie](https://avatars.discourse-cdn.com/v4/letter/m/7feea3/32.png) [@millie](https://discuss.elastic.co/u/millie)\
**Post date:** [January 7, 2021, 5:24pm UTC](https://discuss.elastic.co/t/provided-grok-expressions-do-not-match-field-value/260472/1 "2021-01-07T17:24:29Z")

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Hi,  
I am successfully running filebeats with the logstash module to push serial port logs to elasticsearch/kibana.  
However, I get the error "Provided Grok expressions do not match field value:" but haven't set up any grok expressions yet.  
Filebeat version filebeat-7.8.0-linux-arm64 running on a Raspberry pi 4b os Ubuntu 20.10 (GNU/Linux 5.8.0-1010-raspi aarch64).

Thanks for your help in advance 🙂

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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:** [February 4, 2021, 7:24pm UTC](https://discuss.elastic.co/t/provided-grok-expressions-do-not-match-field-value/260472/2 "2021-02-04T19:24:39Z")

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