Error parsing field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

Briefly, this error occurs when Elasticsearch is unable to parse a specific field in the data it’s trying to index. This could be due to a mismatch in the data type or a malformed field. To resolve this issue, you can check the mapping of the index to ensure the field type matches the data. If the field is not correctly formed, you may need to clean or transform your data before indexing. Also, ensure that the field name doesn’t contain any illegal characters.

This guide will help you check for common problems that cause the log ” error parsing field [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “error parsing field [” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 includeTo = true;
 if (parser.currentToken() != XContentParser.Token.VALUE_NULL) {
 to = rangeType.parseTo(fieldType; parser; coerce.value(); includeTo);
 } else {
 throw new MapperParsingException("error parsing field [" +
 name() + "]; with unknown parameter [" + fieldName + "]");
 range = new Range(rangeType; from; to; includeFrom; includeTo);


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