Failed to parse mapping – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to parse the mapping provided for an index. This could be due to incorrect syntax, invalid field types, or missing required fields in the mapping. To resolve this issue, you should first check the mapping for any syntax errors. Ensure that all field types are valid and all required fields are included. If the error persists, try to simplify the mapping to identify the problematic part. Lastly, ensure that the Elasticsearch version you’re using supports the features used in your mapping.

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, cluster.

Log Context

Log “Failed to parse mapping: {}” class name 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(