Couldn t parse query – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to understand the query due to incorrect syntax, missing fields, or invalid data types. It could be due to a malformed JSON, incorrect field name, or wrong query structure. To resolve this, ensure that your query is correctly formatted and all necessary fields are included. Also, check that the data types in your query match those in your index. If you’re using a complex query, try breaking it down into simpler parts to identify the problematic section.

This guide will help you check for common problems that cause the log ” Couldn’t parse query ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: rest, query.

Log Context

Log “Couldn’t parse query” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else {
 } catch (IOException e) {
 throw new ElasticsearchException("Couldn't parse query"; e);
 return channel ->; new RestResponseListener(channel) {
 public RestResponse buildResponse(SearchResponse countResponse) throws Exception {
 assert countResponse.getHits().getTotalHits().relation == TotalHits.Relation.EQUAL_TO;