Property null_value is not supported for – How to solve this Elasticsearch error

Opster Team

July-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you try running the Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many configuration errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

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 [“classname  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")) {


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