# Error in logstash-plain-logs in /applog/logstash

**URL:** <https://discuss.elastic.co/t/error-in-logstash-plain-logs-in-applog-logstash/368260>\
**Category:** Logstash\
**Created:** [October 4, 2024, 4:22pm UTC](https://discuss.elastic.co/t/error-in-logstash-plain-logs-in-applog-logstash/368260 "2024-10-04T16:22:47Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Badger](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/badger/32/25190_2.png) [@Badger](https://discuss.elastic.co/u/Badger)\
**Post date:** [October 4, 2024, 4:50pm UTC](https://discuss.elastic.co/t/error-in-logstash-plain-logs-in-applog-logstash/368260/2 "2024-10-04T16:50:20Z")

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That's an opensearch exception, but it looks very similar to a mapping exception that elasticsearch will produce. I suggest you read [this](https://discuss.elastic.co/t/logstash-errors-mapper-parsing-exception-vs-illegal-argument-exception/236783/3) thread and [this](https://discuss.elastic.co/t/problem-logstash-outputs-elasticsearch-could-not-index-event-to-elasticsearch-wazuh-alerts-3-x-2020-05-30/235038/6) post. If those don't help then try asking in the [OpenSearch forums](https://forum.opensearch.org/).

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