Cannot generate dynamic mappings of type – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.8

Briefly, this error occurs when Elasticsearch tries to automatically create a mapping for a new field, but the field’s data type is not supported. This could be due to a typo in the field’s data type or using a non-existent data type. To resolve this issue, you can manually create a mapping for the field with a correct data type, or correct the data type if it’s a typo. Also, ensure that the data type you’re using is supported by the version of Elasticsearch you’re using.

This guide will help you check for common problems that cause the log ” Cannot generate dynamic mappings of type [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “Cannot generate dynamic mappings of type [” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (builder == null) {
 Mapper.TypeParser.ParserContext parserContext = context.docMapperParser().parserContext();
 Mapper.TypeParser typeParser = parserContext.typeParser(fieldType.typeName());
 if (typeParser == null) {
 throw new MapperParsingException("Cannot generate dynamic mappings of type [" + fieldType.typeName()
 + "] for [" + currentFieldName + "]");
 builder = typeParser.parse(currentFieldName; new HashMap<>(); parserContext);
 return builder;