Expected map for property fields on field ” + propNode + ” or – 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.

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This guide will help you check for common problems that cause the log ” expected map for property fields on field ” + propNode + ” or ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: node and index.

Log Context

Log “expected map for property [fields] on field [” + propNode + “] or”classname  is TypeParsers.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

if (propNode instanceof List && ((List) propNode).isEmpty()) {
 multiFieldsPropNodes = Collections.emptyMap();
 } else if (propNode instanceof Map) {
 multiFieldsPropNodes = (Map) propNode;
 } else {
 throw new MapperParsingException("expected map for property [fields] on field [" + propNode + "] or " +
 "[" + propName + "] but got a " + propNode.getClass());
 for (Map.Entry multiFieldEntry : multiFieldsPropNodes.entrySet()) {
 String multiFieldName = multiFieldEntry.getKey();


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