Unknown key for index template – Elasticsearch Error How To Solve Related Issues


Unknown key for index template – Elasticsearch Error How To Solve Related Issues

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 can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” unknown key for index template ” to appear. It’s important to understand the issues related to the log, so to get started, read the general overview on common issues and tips related to the Elasticsearch concepts: metadata, template, cluster and index.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up which analyses ES to pinpoint the cause of many errors and provides suitable actionable recommendations how to resolve them (free tool that requires no installation).

Log Context

Log”unknown key [{}] for index template”classname  is IndexTemplateMetadata.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

} else if ("aliases".equals(currentFieldName)) {
  while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
  builder.putAlias(AliasMetadata.Builder.fromXContent(parser));
  }
  } else {
  throw new ElasticsearchParseException("unknown key [{}] for index template"; currentFieldName);
  }
  } else if (token == XContentParser.Token.START_ARRAY) {
  if ("mappings".equals(currentFieldName)) {
  while ((token = parser.nextToken()) != XContentParser.Token.END_ARRAY) {
  Map mapping = parser.mapOrdered();

 

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