Reverse_nested nested path ” + path + ” is not nested – 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.

Take a self-guided product tour to see for yourself (no registration required).

This guide will help you check for common problems that cause the log ” reverse_nested nested path ” + path + ” is not nested ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search and aggregations.

Log Context

Log “[reverse_nested] nested path [” + path + “] is not nested”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

parentObjectMapper = queryShardContext.getObjectMapper(path);
 if (parentObjectMapper == null) {
 return new ReverseNestedAggregatorFactory(name; true; null; queryShardContext; parent; subFactoriesBuilder; metadata);
 if (parentObjectMapper.nested().isNested() == false) {
 throw new AggregationExecutionException("[reverse_nested] nested path [" + path + "] is not nested");
 NestedScope nestedScope = queryShardContext.nestedScope();
 try {


Watch product tour

Try AutoOps to find & fix Elasticsearch problems

Analyze Your Cluster
Skip to content