# Logstash: Problem with dissect

**URL:** <https://discuss.elastic.co/t/logstash-problem-with-dissect/159738>\
**Category:** Logstash\
**Created:** [December 6, 2018, 1:44pm UTC](https://discuss.elastic.co/t/logstash-problem-with-dissect/159738 "2018-12-06T13:44:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![boutout.soukaina](https://avatars.discourse-cdn.com/v4/letter/b/e495f1/32.png) [@boutout.soukaina](https://discuss.elastic.co/u/boutout.soukaina)\
**Post date:** [December 6, 2018, 1:44pm UTC](https://discuss.elastic.co/t/logstash-problem-with-dissect/159738/1 "2018-12-06T13:44:22Z")

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when i start logstash i have this warning: "Dissector mapping, pattern not found" and my logs can not be dissected.

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**Author:** ![Eniqmatic](https://avatars.discourse-cdn.com/v4/letter/e/ea5d25/32.png) [@Eniqmatic](https://discuss.elastic.co/u/Eniqmatic)\
**Post date:** [December 6, 2018, 3:23pm UTC](https://discuss.elastic.co/t/logstash-problem-with-dissect/159738/2 "2018-12-06T15:23:44Z")

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We have no hope of helping without seeing your config 😉

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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:** [January 3, 2019, 3:23pm UTC](https://discuss.elastic.co/t/logstash-problem-with-dissect/159738/3 "2019-01-03T15:23:47Z")

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