Template must have mapping set – 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 ” template must have mapping set ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: template, 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 “template must have mapping set”classname  is DynamicTemplate.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

if (match == null && pathMatch == null && matchMappingType == null) {
 throw new MapperParsingException("template must have match; path_match or match_mapping_type set " + conf.toString());
 }
 if (mapping == null) {
 throw new MapperParsingException("template must have mapping set");
 } 
 XContentFieldType xcontentFieldType = null;
 if (matchMappingType != null && matchMappingType.equals("*") == false) {
 xcontentFieldType = XContentFieldType.fromString(matchMappingType);

 

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