Field type for does not accept more than single value – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 8.8-8.9

Briefly, this error occurs when you try to insert multiple values into a field in Elasticsearch that is not configured to accept more than one value. To resolve this issue, you can either change the data you’re trying to insert so it only includes one value for that field, or you can reconfigure the field in Elasticsearch to accept multiple values. This can be done by setting the field type to ‘nested’ or ‘array’ depending on the nature of the data you’re working with.

This guide will help you check for common problems that cause the log ” field type for [{}] does not accept more than single value ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “field type for [{}] does not accept more than single value” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 } else {
 int count = 0;
 while (token != XContentParser.Token.END_ARRAY) {
 if (allowMultipleValues == false && ++count > 1) {
 throw new ElasticsearchParseException("field type for [{}] does not accept more than single value"; field);
 if (parser.currentToken() == XContentParser.Token.VALUE_NULL) {
 if (nullValue != null) {


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