Meta values can t be null field name – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.6-8.9

Briefly, this error occurs when Elasticsearch tries to index a document with a null value in a field that doesn’t allow null values. This could be due to incorrect data input or a misconfigured mapping. To resolve this issue, you can either ensure that the field always has a value when indexing documents, or you can modify the mapping of the field to allow null values. Alternatively, you can use a script to handle null values during indexing.

This guide will help you check for common problems that cause the log ” [meta] values can’t be null (field [” + name + “]) ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “[meta] values can’t be null (field [” + name + “])” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 throw new MapperParsingException(
 "[meta] values can't be longer than 50 chars; but got [" + value + "] for field [" + name + "]"
 } else if (value == null) {
 throw new MapperParsingException("[meta] values can't be null (field [" + name + "])");
 } else {
 throw new MapperParsingException(
 "[meta] values can only be strings; but got "
 + value.getClass().getSimpleName()
 + "["