# Logstash is processing old documents

**URL:** <https://discuss.elastic.co/t/logstash-is-processing-old-documents/347678>\
**Category:** Logstash\
**Created:** [November 22, 2023, 2:19am UTC](https://discuss.elastic.co/t/logstash-is-processing-old-documents/347678 "2023-11-22T02:19:05Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Rios](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/rios/32/95745_2.png) [@Rios](https://discuss.elastic.co/u/Rios)\
**Post date:** [November 24, 2023, 9:12am UTC](https://discuss.elastic.co/t/logstash-is-processing-old-documents/347678/4 "2023-11-24T09:12:38Z")

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It keeps track which files have been processed. If you testing often, and a file is processed, FB will not process again the same file.

Details about the fields inside the registry are [here](https://discuss.elastic.co/t/how-to-understand-registry-file-in-filebeat/157271/2).

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