Failed to parse query this queryString – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to parse the query string due to incorrect syntax or invalid characters. This could be due to a missing closing bracket, incorrect use of special characters, or a malformed query. To resolve this issue, you should first check the query syntax for any obvious errors. If the syntax appears correct, try escaping any special characters in the query string. If the error persists, consider simplifying the query or breaking it down into smaller parts to identify the problematic section.

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

Log Context

Log “Failed to parse query [” + this.queryString + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 Query query;
 try {
 query = queryParser.parse(rewrittenQueryString);
 } catch (org.apache.lucene.queryparser.classic.ParseException e) {
 throw new QueryShardException(context; "Failed to parse query [" + this.queryString + "]"; e);
 }  if (query == null) {
 return null;


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