Can’t round a BYTES – 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.

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 ” can’t round a BYTES ” 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 “can’t round a [BYTES]”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

return org.elasticsearch.index.fielddata.FieldData.docsWithValue(bytes);
 public final Function roundingPreparer(IndexReader reader) throws IOException {
 throw new AggregationExecutionException("can't round a [BYTES]");
 public abstract static class WithOrdinals extends Bytes { 
 public static final WithOrdinals EMPTY = new WithOrdinals() {


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