# MapperParsingException in conjunction with Security Analytics Errors

**URL:** <https://forum.opensearch.org/t/mapperparsingexception-in-conjunction-with-security-analytics-errors/27358>\
**Category:** Security Analytics\
**Tags:** alerting\
**Created:** [October 23, 2025, 9:19am UTC](https://forum.opensearch.org/t/mapperparsingexception-in-conjunction-with-security-analytics-errors/27358 "2025-10-23T09:19:10Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![OpenAndreas](https://avatars.discourse-cdn.com/v4/letter/o/49beb7/32.png) [@OpenAndreas](https://forum.opensearch.org/u/OpenAndreas)\
**Post date:** [October 23, 2025, 9:19am UTC](https://forum.opensearch.org/t/mapperparsingexception-in-conjunction-with-security-analytics-errors/27358/1 "2025-10-23T09:19:10Z")

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**Versions** (relevant - OpenSearch/Dashboard/Server OS/Browser): 2.19.2

**Describe the issue** : We are seeing the famous NoOpTrigger Errors in Security Analytics. When examing the logs one error dominates (MapperParsingException). We assume a relation.

**Configuration** :

**Relevant Logs or Screenshots** :

Exemplary screenshot of Security Analytcis:

 ![grafik](https://us1.discourse-cdn.com/flex019/uploads/mauve_hedgehog/original/2X/c/cc17936e08a60d48bd8d8b8a37fc724fdda7b77c.png)

Log example (this log occurs once per minute):

[2025-10-23T09:08:07,819][ERROR][o.o.a.u.DocLevelMonitorQueries] [opensearch-nodes-2] MapperParsingException[failed to parse]; nested: QueryShardException[No field mapping can be found for the field with name [trigger\_field]];

I do not understand either of those messages. Some pointers on how to further debug would be appreciated.

Regards,  
Andreas

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**Author:** ![Leeroy](https://avatars.discourse-cdn.com/v4/letter/l/eb9ed0/32.png) [@Leeroy](https://forum.opensearch.org/u/Leeroy)\
**Post date:** [October 24, 2025, 5:29am UTC](https://forum.opensearch.org/t/mapperparsingexception-in-conjunction-with-security-analytics-errors/27358/2 "2025-10-24T05:29:00Z")

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Hi @OpenAndreas ,

Could you provide a sample logs and what you did to try set this up.

Leeroy.

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**Author:** ![OpenAndreas](https://avatars.discourse-cdn.com/v4/letter/o/49beb7/32.png) [@OpenAndreas](https://forum.opensearch.org/u/OpenAndreas)\
**Post date:** [October 24, 2025, 6:46am UTC](https://forum.opensearch.org/t/mapperparsingexception-in-conjunction-with-security-analytics-errors/27358/3 "2025-10-24T06:46:11Z")

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Hi Leeroy,

regarding the first part of your question, this

`[2025-10-23T09:08:07,819][ERROR][o.o.a.u.DocLevelMonitorQueries] [opensearch-nodes-2] MapperParsingException[failed to parse]; nested: QueryShardException[No field mapping can be found for the field with name [trigger_field]];`

is already the sample log. The OpenSearch logs are full of this.

And I just setup some detectors (the same that run fine in other installations). They generate the NoOp trigger errors every 10 minutes (they are scheduled to run every 5 minutes).

The “trigger\_field” seems to indicate some internal problem since I do not have any logs containing a field named “trigger\_field”. I do have triggers. They send a message to an external webhook.

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**Author:** ![system](https://us1.discourse-cdn.com/flex019/uploads/mauve_hedgehog/original/2X/3/33547ea01a5b12dcca2958411d3edd97ae2ea8c1.png) [@system](https://forum.opensearch.org/u/system)\
**Post date:** [December 23, 2025, 6:47am UTC](https://forum.opensearch.org/t/mapperparsingexception-in-conjunction-with-security-analytics-errors/27358/4 "2025-12-23T06:47:10Z")

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