Cannot define copy to parameter on a field with a script – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 7.13-8.9

Briefly, this error occurs when you try to use the “copy_to” parameter on a field that is defined with a script in Elasticsearch. The “copy_to” parameter is used to copy the values of one field to another at index time, but it cannot be used with scripted fields. To resolve this issue, you can either remove the script from the field or remove the “copy_to” parameter. Alternatively, you could create a new non-scripted field to use with the “copy_to” parameter.

This guide will help you check for common problems that cause the log ” Cannot define copy_to parameter on a field with a script ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “Cannot define copy_to parameter on a field with a script” class name is FieldMapper.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 }
 if (s != null && multiFieldsBuilder.hasMultiFields()) {
 throw new MapperParsingException("Cannot define multifields on a field with a script");
 }
 if (s != null && copyTo.hasValues()) {
 throw new MapperParsingException("Cannot define copy_to parameter on a field with a script");
 }
 });
 }  /**

 

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