Aggregator ” + name + ” of type – 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 ” Aggregator ” + name + ” of type ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search and aggregations.

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 “Aggregator [” + name + “] of type [“classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

return trackScores;
 public TopHitsAggregationBuilder subAggregations(Builder subFactories) {
 throw new AggregationInitializationException("Aggregator [" + name + "] of type ["
 + getType() + "] cannot accept sub-aggregations");
 public BucketCardinality bucketCardinality() {


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