Parameters required size and shard size must be >0 in terms aggregation – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when the parameters ‘required_size’ and ‘shard_size’ in the terms aggregation of an Elasticsearch query are set to 0 or less. These parameters control the number of unique terms to return and the number of unique terms to consider per shard, respectively. To resolve this issue, ensure that both parameters are set to a positive integer. If you don’t want to limit the number of terms, you can set these parameters to a very large number.

This guide will help you check for common problems that cause the log ” parameters [required_size] and [shard_size] must be >0 in terms aggregation. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: search, aggregations.

Log Context

Log “parameters [required_size] and [shard_size] must be >0 in terms aggregation.” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (shardMinDocCount > minDocCount) {
 }  if (requiredSize <= 0 || shardSize <= 0) {
 throw new ElasticsearchException("parameters [required_size] and [shard_size] must be >0 in terms aggregation.");
 }  if (minDocCount < 0 || shardMinDocCount < 0) {
 throw new ElasticsearchException("parameter [min_doc_count] and [shardMinDocCount] must be >=0 in terms aggregation.");


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