Query string analyzer analyzer not found – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch cannot find the specified analyzer in the query_string. Analyzers are used to break down text into tokens for indexing. If the analyzer is not found, it means it’s either not defined or incorrectly named. To resolve this, ensure that the analyzer is correctly defined in your index settings. If it’s a custom analyzer, make sure it’s properly configured and named. Alternatively, you can use one of the built-in analyzers provided by Elasticsearch.

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This guide will help you check for common problems that cause the log ” [query_string] analyzer [” + analyzer + “] not found ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: query, index.

Log Context

Log “[query_string] analyzer [” + analyzer + “] not found” class name is QueryStringQueryBuilder.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  if (analyzer != null) {
 NamedAnalyzer namedAnalyzer = context.getIndexAnalyzers().get(analyzer);
 if (namedAnalyzer == null) {
 throw new QueryShardException(context; "[query_string] analyzer [" + analyzer + "] not found");
 }  if (quoteAnalyzer != null) {


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