Unexpected token while parsing source settings – 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 ” unexpected token while parsing source settings ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: source and settings.

Log Context

Log “unexpected token while parsing source settings”classname  is MultiGetRequest.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else if (token.isValue()) {
 } else {
 throw new ElasticsearchParseException("unexpected token while parsing source settings");
 fetchSourceContext = new FetchSourceContext(fetchSourceContext.fetchSource();
 includes == null ? Strings.EMPTY_ARRAY : includes.toArray(new String[includes.size()]);


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