Missing path field for nested aggregation aggregationName – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch tries to execute a nested aggregation but the required ‘path’ field is not provided. The ‘path’ field is essential as it specifies the nested document path. To resolve this issue, ensure that the ‘path’ field is included in your nested aggregation query. Also, verify that the ‘path’ field points to a valid nested field in your Elasticsearch index. If the field is not nested, you may need to reindex your data with the correct nested field structure.

This guide will help you check for common problems that cause the log ” Missing [path] field for nested aggregation [” + aggregationName + “] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search, aggregations.

Log Context

Log “Missing [path] field for nested aggregation [” + aggregationName + “]” class name is NestedAggregationBuilder.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }  if (path == null) {
 // "field" doesn't exist; so we fall back to the context of the ancestors
 throw new ParsingException(parser.getTokenLocation(); "Missing [path] field for nested aggregation [" + aggregationName + "]");
 }  return new NestedAggregationBuilder(aggregationName; path);