Registry miss-match – expected RareTermsAggregatorSupplier found – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.8-7.9

Briefly, this error occurs when there’s a mismatch between the expected and found aggregator in Elasticsearch. This usually happens due to version incompatibility or incorrect configuration. To resolve this, you can try the following: 1) Ensure that all nodes in your cluster are running the same version of Elasticsearch. 2) Check your configuration settings for any errors. 3) If you’re using plugins, make sure they are compatible with your Elasticsearch version. 4) If the error persists, consider reindexing your data.

This guide will help you check for common problems that cause the log ” Registry miss-match – expected RareTermsAggregatorSupplier; found [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search, aggregations.

Log Context

Log “Registry miss-match – expected RareTermsAggregatorSupplier; found [” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 CardinalityUpperBound cardinality;
 Map metadata) throws IOException {
 AggregatorSupplier aggregatorSupplier = queryShardContext.getValuesSourceRegistry().getAggregator(config;
 if (aggregatorSupplier instanceof RareTermsAggregatorSupplier == false) {
 throw new AggregationExecutionException("Registry miss-match - expected RareTermsAggregatorSupplier; found [" +
 aggregatorSupplier.getClass().toString() + "]");
 }  return ((RareTermsAggregatorSupplier) aggregatorSupplier).build(name; factories; config.getValuesSource(); config.format();
 maxDocCount; precision; includeExclude; searchContext; parent; cardinality; metadata);