Must be a number – How to solve this OpenSearch exception

Opster Team

Aug-23, Version: 2.4-2.9

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Briefly, this error occurs when OpenSearch expects a numerical value as input but receives a non-numerical value instead. This could be due to incorrect data types in the query or incorrect field mapping. To resolve this, ensure that the input value is a number or the field expecting the number is correctly mapped. If it’s a query issue, correct the query to provide a numerical value. If it’s a mapping issue, you may need to reindex your data with the correct mapping.

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This guide will help you check for common problems that cause the log ” {} must be a number ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: .

Log Context

Log “{} must be a number” class name is We extracted the following from OpenSearch source code for those seeking an in-depth context :

 } catch (NumberFormatException e) {
 throw new OpenSearchParseException("[{}] and [{}] must be valid double values"; e; LONGITUDE; LATITUDE);
 throw new OpenSearchParseException("{} must be a number"; field);
 }  if (data.get(LONGITUDE) == null) {
 throw new OpenSearchParseException("field [{}] missing"; LONGITUDE);


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