No handler for type ” + type + ” declared on field ” + multiFieldName + ” – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

Briefly, this error occurs when Elasticsearch encounters an unknown or unsupported data type in a field mapping. Elasticsearch requires a data type to be specified for each field, and may not recognize a custom or non-standard data type. To resolve the issue, you can try modifying the field mapping to use a recognized data type, or extending Elasticsearch to support the custom data type.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

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

Log Context

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

throw new MapperParsingException("Type [" + type + "] cannot be used in multi field");
 Mapper.TypeParser typeParser = parserContext.typeParser(type);
 if (typeParser == null) {
 throw new MapperParsingException("no handler for type [" + type + "] declared on field [" + multiFieldName + "]");
 builder.addMultiField(typeParser.parse(multiFieldName; multiFieldNodes; parserContext));
 DocumentMapperParser.checkNoRemainingFields(propName; multiFieldNodes; parserContext.indexVersionCreated());


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