Prefix query – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 8.3-8.9

Briefly, this error occurs when Elasticsearch is unable to execute a prefix query due to incorrect syntax, missing or invalid field name, or non-textual field. A prefix query is used to search for documents where a specific field starts with a certain prefix. To resolve this issue, ensure that the field you’re querying exists and is of the correct type. Also, check your query syntax for any errors. If you’re querying a non-textual field, consider using a range query instead. Lastly, ensure your Elasticsearch cluster is healthy and running the correct version.

This guide will help you check for common problems that cause the log ” prefix query ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: query, index.

Log Context

Log “prefix query” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 String value;
 @Nullable MultiTermQuery.RewriteMethod method;
 boolean caseInsensitve;
 SearchExecutionContext context
 ) {
 throw new QueryShardException(context; fail("prefix query"));
 }  @Override
 public Query wildcardQuery(
 String value;


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