Field name ” + multiFieldName + ” which is a multi field of ” + name + ” cannot – 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.

Briefly, this error occurs when a multi-field is defined with an invalid name. Multi-fields allow for the indexing of a single field with multiple variations. To resolve the issue, ensure that the name of the multi-field is correctly defined.

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 ” Field name ” + multiFieldName + ” which is a multi field of ” + name + ” cannot ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: index.


Log Context

Log “Field name [” + multiFieldName + “] which is a multi field of [” + name + “] cannot”classname  is TypeParsers.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

} 
 for (Map.Entry multiFieldEntry : multiFieldsPropNodes.entrySet()) {
 String multiFieldName = multiFieldEntry.getKey();
 if (multiFieldName.contains(".")) {
 throw new MapperParsingException("Field name [" + multiFieldName + "] which is a multi field of [" + name + "] cannot" +
 " contain '.'");
 }
 if (!(multiFieldEntry.getValue() instanceof Map)) {
 throw new MapperParsingException("illegal field [" + multiFieldName + "]; only fields can be specified inside fields");
 }

 

See how you can use AutoOps to resolve issues


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