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

Opster Team

August-23, Version: 7.16-8.9

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Briefly, this error occurs when Elasticsearch cannot find a handler for the specified type declared on a runtime field. This could be due to a typo in the type name, or the type might not be supported. To resolve this issue, you should first verify the type name and ensure it’s spelled correctly. If the spelling is correct, check if the type is supported in your Elasticsearch version. If it’s not supported, you may need to update your Elasticsearch version or use a different type that is supported in your current version.

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This guide will help you check for common problems that cause the log ” No handler for type [” + type + “] declared on runtime 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 runtime field [” + fieldName + “]” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else {
 type = typeNode.toString();
 Parser typeParser = parserContext.runtimeFieldParser(type);
 if (typeParser == null) {
 throw new MapperParsingException("No handler for type [" + type + "] declared on runtime field [" + fieldName + "]");
 runtimeFields.put(fieldName; builder.apply(typeParser.parse(fieldName; propNode; parserContext)));
 MappingParser.checkNoRemainingFields(fieldName; propNode);


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