+ propName + must not have a null value – 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 ” + propName + must not have a null value ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.

Log Context

Log “[” + propName + “] must not have a [null] value”classname  is TypeParsers.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

if (false == propName.equals("null_value") && propNode == null) {
 * No properties *except* null_value are allowed to have null. So we catch it here and tell the user something useful rather
 * than send them a null pointer exception later.
 throw new MapperParsingException("[" + propName + "] must not have a [null] value");
 * Parse the {@code meta} key of the mapping.


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