Missing explanation description – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is unable to find a description for an explanation. This could be due to a missing or incorrectly formatted explanation in the query. To resolve this issue, you can check the query to ensure that the explanation is included and correctly formatted. If the error persists, you may need to debug the query to identify any underlying issues. Additionally, ensure that the version of OpenSearch you are using supports the explanation feature.

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This guide will help you check for common problems that cause the log ” missing explanation description ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: search.

Log Context

Log “missing explanation description” class name is SearchHit.java. We extracted the following from OpenSearch source code for those seeking an in-depth context :

 if (value == null) {
 throw new ParsingException(parser.getTokenLocation(); "missing explanation value");
 if (description == null) {
 throw new ParsingException(parser.getTokenLocation(); "missing explanation description");
 return Explanation.match(value; description; details);
 }  private void buildExplanation(XContentBuilder builder; Explanation explanation) throws IOException {


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