Unknown rounding id id – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch encounters an unrecognized rounding ID during a date histogram aggregation. The rounding ID is used to group date fields into specific time intervals. If the ID is unknown, it means the specified interval is not supported. To resolve this issue, you can check the OpenSearch documentation for the correct rounding ID values. Alternatively, you can use a different, supported time interval for your date histogram aggregation. Lastly, ensure that your OpenSearch version supports the rounding ID you’re using.

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This guide will help you check for common problems that cause the log ” unknown rounding id [” + id + “] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: .

Log Context

Log “unknown rounding id [” + id + “]” class name is Rounding.java. We extracted the following from OpenSearch source code for those seeking an in-depth context :

 case TimeIntervalRounding.ID:
 return new TimeIntervalRounding(in);
 case OffsetRounding.ID:
 return new OffsetRounding(in);
 throw new OpenSearchException("unknown rounding id [" + id + "]");
 }  /**
 * Implementation of {@link Prepared} using pre-calculated "round down" points.


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