No handler for type type declared on field fieldName – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

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Briefly, this error occurs when Elasticsearch encounters a field type in the mapping that it doesn’t recognize. This could be due to a typo in the field type or using a type that is not supported. To resolve this issue, you should first check the field type for any spelling mistakes. If there are none, verify that the type you’re using is supported in your version of Elasticsearch. If the type is deprecated, you’ll need to update your mapping to use a supported type.

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This guide will help you check for common problems that cause the log ” No handler for type [” + type + “] declared on field [” + fieldName + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index, handler.

Log Context

Log “No handler for type [” + type + “] declared on field [” + fieldName + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 + "] which does not support subobjects"
 Mapper.TypeParser typeParser = parserContext.typeParser(type);
 if (typeParser == null) {
 throw new MapperParsingException("No handler for type [" + type + "] declared on field [" + fieldName + "]");
 Mapper.Builder fieldBuilder;
 if (objBuilder.subobjects.value() == false) {
 fieldBuilder = typeParser.parse(fieldName; propNode; parserContext);
 } else {


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