No handler for type ” + type + ” declared on field ” + fieldName + ” – 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 ” No handler for type ” + type + ” declared on field ” + fieldName + ” ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: handler and 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 “No handler for type [” + type + “] declared on field [” + fieldName + “]”classname  is ObjectMapper.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

}
 } 
 Mapper.TypeParser typeParser = parserContext.typeParser(type);
 if (typeParser == null) {
 throw new MapperParsingException("No handler for type [" + type + "] declared on field [" + fieldName + "]");
 }
 String[] fieldNameParts = fieldName.split("\.");
 String realFieldName = fieldNameParts[fieldNameParts.length - 1];
 Mapper.Builder fieldBuilder = typeParser.parse(realFieldName; propNode; parserContext);
 for (int i = fieldNameParts.length - 2; i >= 0; --i) {

 

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