Failed to parse mapping: – 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 Elasticsearch is unable to parse the mapping configuration for an index. The mapping configuration defines the schema of the index and how it should be indexed and searched. The solution to this error is to review and correct the mapping configuration.

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 ” Failed to parse mapping: ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: metadata and cluster.

Log Context

Log “Failed to parse mapping: {}”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

if (request.mappings != null) {
 try {
 templateBuilder.putMapping(MapperService.SINGLE_MAPPING_NAME; request.mappings);
 } catch (Exception e) {
 throw new MapperParsingException("Failed to parse mapping: {}"; e; request.mappings);
 for (Alias alias : request.aliases) {
 AliasMetadata aliasMetadata = AliasMetadata.builder(


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