Illegal object property in graph definition – 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 Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” Illegal object property in graph definition ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: rest and plugin.

Log Context

Log “Illegal object property in graph definition”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

throw new ElasticsearchParseException(
 "Controls are a global setting that can only be set in the root " + fieldName;;
 parseControls(parser; graphRequest);
 } else {
 throw new ElasticsearchParseException("Illegal object property in graph definition " + fieldName;; 
 } else {
 throw new ElasticsearchParseException("Illegal property in graph definition " + fieldName;;


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