Property null value is not supported for – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-7.9

Briefly, this error occurs when you try to use the [null_value] property for a field type that doesn’t support it in Elasticsearch. Not all field types support this property. To resolve this issue, you should either change the field type to one that supports the [null_value] property, or remove the [null_value] property from the field’s mapping. Alternatively, you can handle null values in your application code before indexing the data into Elasticsearch.

This guide will help you check for common problems that cause the log ” Property [null_value] is not supported for [ ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “Property [null_value] is not supported for [” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 for (Iterator> iterator = node.entrySet().iterator(); iterator.hasNext();) {
 Map.Entry entry =;
 String propName = entry.getKey();
 Object propNode = entry.getValue();
 if (propName.equals("null_value")) {
 throw new MapperParsingException("Property [null_value] is not supported for [" +
 + "] field types.");
 } else if (propName.equals("coerce")) {
 builder.coerce(XContentMapValues.nodeBooleanValue(propNode; name + ".coerce"));
 } else if (propName.equals("locale")) {