Could not parse slack message unknown field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch tries to parse a Slack message but encounters an unknown field. This could be due to a mismatch between the expected data structure and the actual data structure of the Slack message. To resolve this issue, you can: 1) Check the structure of the Slack message and ensure it matches with the expected structure. 2) Update the Elasticsearch mapping to include the new field. 3) If the field is not necessary, you can modify the Slack message to remove the unknown field.

This guide will help you check for common problems that cause the log ” could not parse slack message. unknown field [{}]. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “could not parse slack message. unknown field [{}].” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else {
 throw new ElasticsearchParseException("could not parse slack message. unknown field [{}]."; currentFieldName);
 }  return;


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