Failed to load analyzer for name – How to solve this Elasticsearch error

Opster Team

March-22, 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 load analyzer for name ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index, analysis.

Log Context

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

AnalysisModule.AnalysisProvider> provider = analyzers.get(analyzer);
 return provider == null ? null : cachedAnalyzer.computeIfAbsent(analyzer; (key) -> {
 try {
 return provider.get(environment; key).get();
 } catch (IOException ex) {
 throw new ElasticsearchException("failed to load analyzer for name " + key; ex);
 return analyzerProvider.get(environment; analyzer).get();


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