Invalid aggregation 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 Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

Briefly, this error message indicates that an invalid aggregation name was specified in the request. Aggregations in Elasticsearch are used to perform complex data analysis and summarization operations on large datasets. When performing an aggregation, the type of aggregation to be performed must be specified. If an invalid aggregation name is specified, this error will be thrown.

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.

This guide will help you check for common problems that cause the log ” Invalid aggregation name ” 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 “Invalid aggregation name [“classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

throw new ParsingException(parser.getTokenLocation();
 "Unexpected token " + token + " in [aggs]: aggregations definitions must start with the name of the aggregation.");
 final String aggregationName = parser.currentName();
 if (!validAggMatcher.reset(aggregationName).matches()) {
 throw new ParsingException(parser.getTokenLocation(); "Invalid aggregation name [" + aggregationName
 + "]. Aggregation names can contain any character except '['; ']'; and '>'");
 token = parser.nextToken();
 if (token != XContentParser.Token.START_OBJECT) {


See how you can use AutoOps to resolve issues

How useful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Analyze your cluster & get personalized recommendations

Skip to content