No handler for type – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.11-7.15

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Briefly, this error occurs when Elasticsearch encounters an unknown or unsupported field type in the mapping. This could be due to a typo or using a field type that is not supported in the current version of Elasticsearch. To resolve this issue, you should check the mapping for any typos or unsupported field types. If you find any, correct them and try again. If the field type is not supported in your current version of Elasticsearch, consider upgrading to a version that supports it or use a different field type that achieves the same purpose.

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This guide will help you check for common problems that cause the log ” No handler for type [ ” 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 [” class name is RuntimeField.java. 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)));
 propNode.remove("type");
 MappingParser.checkNoRemainingFields(fieldName; propNode);

 

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