Invalid token in inner_hits array – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Invalid token in inner_hits array ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Invalid token in inner_hits array”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

List innerHitBuilders = new ArrayList<>();
 for (currentToken = parser.nextToken(); currentToken != XContentParser.Token.END_ARRAY; currentToken = parser.nextToken()) {
 if (currentToken == XContentParser.Token.START_OBJECT) {
 } else {
 throw new ParsingException(parser.getTokenLocation(); "Invalid token in inner_hits array");


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