Aggregation ” + name() + ” must have cardinality 1 but was ” + cardinality + ” – How to solve this Elasticsearch error

Opster Team

March-22, 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 occurs when an aggregation name is not unique, and is used for more than one aggregation. Elasticsearch requires that aggregation names be unique within a given search request. To resolve the issue, you can try reviewing the search request and ensuring that all aggregation names are unique, or modifying the aggregation structure to use unique names.

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 ” Aggregation ” + name() + ” must have cardinality 1 but was ” + cardinality + ” ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search, aggregations.


Log Context

Log “Aggregation [” + name() + “] must have cardinality 1 but was [” + cardinality + “]”classname  is GlobalAggregatorFactory.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

#ERROR!

 

See how you can use AutoOps to resolve issues


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