Analyzer must be set for field ” + name + ” but wasn’t. – 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 Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Analyzer must be set for field ” + name + ” but wasn’t. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Analyzer must be set for field [” + name + “] but wasn’t.”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 parseField(builder; name; node; parserContext);
 if (builder.analyzer() == null) {
 throw new MapperParsingException("Analyzer must be set for field [" + name + "] but wasn't.");
 return builder;


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