Failed to parse significance heuristic no script found in script heuristic – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.5

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Briefly, this error occurs when Elasticsearch is unable to find a script in the script_heuristic field while parsing a significance heuristic. This could be due to a missing or incorrectly named script. To resolve this issue, ensure that the script exists and is correctly referenced in your request. Also, check the syntax of your script for any errors. If the script is stored in a file, verify that the file is in the correct location and accessible to Elasticsearch.

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This guide will help you check for common problems that cause the log ” failed to parse [{}] significance heuristic. no script found in script_heuristic ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: aggregations, search.

Log Context

Log “failed to parse [{}] significance heuristic. no script found in script_heuristic” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  if (script == null) {
 throw new ElasticsearchParseException("failed to parse [{}] significance heuristic. no script found in script_heuristic";
 return new ScriptHeuristic(script);


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