Failed to create SearchContextHighlighter – 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 ” failed to create SearchContextHighlighter ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search.

Log Context

Log “failed to create SearchContextHighlighter”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

if (source.highlighter() != null) {
 HighlightBuilder highlightBuilder = source.highlighter();
 try {
 } catch (IOException e) {
 throw new SearchException(shardTarget; "failed to create SearchContextHighlighter"; e);
 if (source.scriptFields() != null && source.size() != 0) {
 int maxAllowedScriptFields = context.mapperService().getIndexSettings().getMaxScriptFields();
 if (source.scriptFields().size() > maxAllowedScriptFields) {


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