Malformed mapping; no type name found – 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 ” malformed mapping; no type name found ” 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 “malformed mapping; no type name found”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

private Tuple> extractMapping(String type; Map root) throws MapperParsingException {
 if (root.size() == 0) {
 if (type != null) {
 return new Tuple<>(type; root);
 } else {
 throw new MapperParsingException("malformed mapping; no type name found");
 String rootName = root.keySet().iterator().next();
 Tuple> mapping;


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