Fuzzy queries cannot be executed when – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.7-7.15

Briefly, this error occurs when ‘fuzzy’ queries are attempted on Elasticsearch while the ‘fuzziness’ parameter is not properly set or is disabled. Fuzzy queries allow for approximate searches, but they require specific configurations. To resolve this issue, you can either enable the ‘fuzziness’ parameter in your Elasticsearch settings or modify your query to not use ‘fuzzy’ if it’s not necessary. Additionally, ensure that the field you’re querying supports ‘fuzzy’ queries, as not all field types do.

This guide will help you check for common problems that cause the log ” [fuzzy] queries cannot be executed when ‘ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “[fuzzy] queries cannot be executed when ‘” class name is StringFieldType.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 public Query fuzzyQuery(Object value; Fuzziness fuzziness; int prefixLength; int maxExpansions;
 boolean transpositions; SearchExecutionContext context) {
 if (context.allowExpensiveQueries() == false) {
 throw new ElasticsearchException("[fuzzy] queries cannot be executed when '" +
 ALLOW_EXPENSIVE_QUERIES.getKey() + "' is set to false.");
 return new FuzzyQuery(new Term(name(); indexedValueForSearch(value));
 fuzziness.asDistance(BytesRefs.toString(value)); prefixLength; maxExpansions; transpositions);


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