Value source of type – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.5

Briefly, this error occurs when Elasticsearch tries to execute a query or aggregation on a field with a data type that is not compatible with the operation. For instance, trying to perform a text operation on a numeric field. To resolve this, ensure that the field you’re querying matches the expected data type for the operation. You may need to reindex your data with the correct mappings or use a script to convert the field data type during the query or aggregation.

This guide will help you check for common problems that cause the log ” value source of type [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: aggregations, search, source.

Log Context

Log “value source of type [” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 return (VS) numericScript();
 if (valueSourceType() == ValuesSourceType.BYTES) {
 return (VS) bytesScript();
 throw new AggregationExecutionException("value source of type [" + valueSourceType().name()
 + "] is not supported by scripts");
 }  if (valueSourceType() == ValuesSourceType.NUMERIC) {
 return (VS) numericField();


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