Object mapping for mapper name with array for – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

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Briefly, this error occurs when Elasticsearch encounters an array where it expects a single value during indexing. This is typically due to a mismatch between the data structure in the index mapping and the actual data being indexed. To resolve this issue, you can either modify the index mapping to match the data structure or transform the data to match the existing index mapping. Alternatively, you can use the “ignore_malformed” option to ignore such errors, but this may lead to data loss or incorrect search results.

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This guide will help you check for common problems that cause the log ” object mapping for [” + mapper.name() + “] with array for [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: mapping, index.

Log Context

Log “object mapping for [” + mapper.name() + “] with array for [” class name is DocumentParser.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else if (token == XContentParser.Token.START_ARRAY) {
 parseArray(context; mapper; lastFieldName; paths);
 } else if (token == XContentParser.Token.VALUE_NULL) {
 parseNullValue(context; mapper; lastFieldName; paths);
 } else if (token == null) {
 throw new MapperParsingException("object mapping for [" + mapper.name() + "] with array for [" + arrayFieldName
 + "] tried to parse as array; but got EOF; is there a mismatch in types for the same field?");
 } else {
 assert token.isValue();
 parseValue(context; mapper; lastFieldName; token; paths);


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