Nested nested path path is not nested – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8

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Briefly, this error occurs when you are trying to perform a nested query on a field that is not mapped as nested in Elasticsearch. Elasticsearch requires explicit mapping for nested fields. To resolve this issue, you can either change your query to not use nested queries on non-nested fields, or you can reindex your data with the correct nested mappings. Remember, changing the mapping requires reindexing the data.

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This guide will help you check for common problems that cause the log ” [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, aggregations.

Log Context

Log “[nested] nested path [” + path + “] is not nested” class name is NestedAggregationBuilder.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 // in case the path has been unmapped:
 return new NestedAggregatorFactory(name; null; null; context; parent; subFactoriesBuilder; metadata);
 }  if (childObjectMapper.isNested() == false) {
 throw new AggregationExecutionException("[nested] nested path [" + path + "] is not nested");
 }
 try {
 NestedObjectMapper parentObjectMapper = context.nestedScope().nextLevel((NestedObjectMapper) childObjectMapper);
 return new NestedAggregatorFactory(
 name;

 

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