Failed to build aggregation ” + aggregator.name() + ” – How to solve this Elasticsearch error

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Failed to build aggregation ” + aggregator.name() + ” – 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 ” Failed to build aggregation ” + aggregator.name() + ” ” 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 “Failed to build aggregation [” + aggregator.name() + “]”classname  is AggregationPhase.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

for (Aggregator aggregator : context.aggregations().aggregators()) {
 try {
 aggregator.postCollection();
 aggregations.add(aggregator.buildTopLevel());
 } catch (IOException e) {
 throw new AggregationExecutionException("Failed to build aggregation [" + aggregator.name() + "]"; e);
 }
 }
 context.queryResult().aggregations(InternalAggregations.from(aggregations)); 
 // disable aggregations so that they don't run on next pages in case of scrolling

 

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