Failed to parse mapping definition – 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 ” failed to parse mapping definition ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: mapping 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 “failed to parse mapping definition”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

Map root;
 try (XContentParser parser = XContentType.JSON.xContent()
 .createParser(xContentRegistry; LoggingDeprecationHandler.INSTANCE; source)) {
 root = parser.mapOrdered();
 } catch (Exception e) {
 throw new MapperParsingException("failed to parse mapping definition"; e);
 return extractMapping(type; root);


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