Mapping type name is empty – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.17

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Briefly, this error occurs when you try to create or update an Elasticsearch index without specifying a mapping type name. Mapping types are essential in Elasticsearch as they define the data structure/types of the fields for documents. To resolve this issue, ensure that you provide a valid mapping type name when creating or updating an index. Also, check your request body for any syntax errors or missing fields. If you’re using Elasticsearch 7.x or later, remember that mapping types are deprecated, so you should design your index and queries accordingly.

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This guide will help you check for common problems that cause the log ” mapping type name is empty ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: mapping, index.

Log Context

Log “mapping type name is empty” class name is MapperService.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 return true;
 }  static void validateTypeName(String type) {
 if (type.length() == 0) {
 throw new InvalidTypeNameException("mapping type name is empty");
 }
 if (type.length() > 255) {
 throw new InvalidTypeNameException(
 "mapping type name [" + type + "] is too long; limit is length 255 but was [" + type.length() + "]"
 );

 

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