Property value of field ” + name + ” can’t be null. – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Property value of field ” + name + ” can’t be null. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Property [value] of field [” + name + “] can’t be [null].”classname  is ConstantKeywordFieldMapper.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

public Mapper.Builder parse(String name; Map node; ParserContext parserContext) throws MapperParsingException {
 Object value = null;
 if (node.containsKey("value")) {
 value = node.remove("value");
 if (value == null) {
 throw new MapperParsingException("Property [value] of field [" + name + "] can't be [null].");
 }
 if (value instanceof Number == false && value instanceof CharSequence == false) {
 throw new MapperParsingException("Property [value] of field [" + name +
 "] must be a number or a string; but got [" + value + "]");
 }

 

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