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

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to load the specified analyzer for a particular field. This could be due to a misconfiguration or the analyzer not being available in the Elasticsearch instance. To resolve this issue, you can check the Elasticsearch configuration to ensure the analyzer is correctly defined. If it’s a custom analyzer, ensure it’s properly installed. Alternatively, you can change the field mapping to use a different analyzer that is available in your Elasticsearch instance.

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” class name 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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