Expected one of ” + XContentParser.Token.VALUE_BOOLEAN + “; – 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 Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” Expected one of ” + XContentParser.Token.VALUE_BOOLEAN + “; ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: parser and search.

Log Context

Log “Expected one of [” + XContentParser.Token.VALUE_BOOLEAN + “;”classname  is FetchSourceContext.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

throw new ParsingException(parser.getTokenLocation(); "Unknown key for a " + token + " in [" + currentFieldName + "].";
 } else {
 throw new ParsingException(parser.getTokenLocation(); "Expected one of [" + XContentParser.Token.VALUE_BOOLEAN + "; "
 + XContentParser.Token.START_OBJECT + "] but found [" + token + "]"; parser.getTokenLocation());
 return new FetchSourceContext(fetchSource; includes; excludes);


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