Cannot add a value for field – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.15

Briefly, this error occurs when you try to add a value to a field that doesn’t exist in the Elasticsearch index mapping or when the field is defined as non-indexable. To resolve this, you can either update the index mapping to include the new field or ensure that the field is indexable. Alternatively, you can reindex your data with the correct mapping. Be cautious when updating mappings as it can potentially lead to data loss.

This guide will help you check for common problems that cause the log ” Cannot add a value for field [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “Cannot add a value for field [” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (mapper instanceof ObjectMapper == false) {
 return null;
 objectMapper = (ObjectMapper) mapper;
 if (objectMapper.isNested()) {
 throw new MapperParsingException("Cannot add a value for field ["
 + fieldName + "] since one of the intermediate objects is mapped as a nested object: ["
 + + "]");
 String leafName = subfields[subfields.length - 1];


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