Template must have mapping set – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.1

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Briefly, this error occurs when an Elasticsearch index template is created without specifying the mapping. The mapping is essential as it defines the types of fields and how they should be stored and indexed. To resolve this issue, you can either add a mapping to your template or remove the template if it’s not needed. If you’re unsure about the mapping, you can use the “get mapping” API to retrieve the mapping of an existing index and use it as a reference.

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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, index, mapping.

Log Context

Log “template must have mapping set” class name 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) {
 try {

 

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