Field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-6.8

Briefly, this error occurs when Elasticsearch tries to access a field that doesn’t exist in the index or when the field is not properly mapped. To resolve this issue, you can check the mapping of your index to ensure the field exists and is correctly mapped. If the field doesn’t exist, you may need to add it to your index. If the field is not correctly mapped, you may need to reindex your data with the correct mapping. Also, ensure that your query is correctly referencing the field.

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

Log Context

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

 // parseField below will happily parse the doc_values setting; but it is then never passed to
 // the AllFieldMapper ctor in the builder since it is not valid. Here we validate
 // the doc values settings (old and new) are rejected
 Object docValues = node.get("doc_values");
 if (docValues != null && TypeParsers.nodeBooleanValueLenient(name; "doc_values"; docValues)) {
 throw new MapperParsingException("Field [" + name +
 "] is always tokenized and cannot have doc values");
 // convoluted way of specifying doc values
 Object fielddata = node.get("fielddata");
 if (fielddata != null) {