Invalid template – 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 template used in an Elasticsearch query is invalid or contains errors. Elasticsearch templates can be used to create reusable search queries or updates, but if the template is invalid, the query will fail. To resolve this error, review the Elasticsearch template and check that it is valid and free from errors.

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This guide will help you check for common problems that cause the log ” Invalid template ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: template and plugin.

Log Context

Log “Invalid template”classname  is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 try {
 XContentHelper.convertToMap(JsonXContent.jsonXContent; source; false);
 } catch (Exception e) {
 throw new ElasticsearchParseException("Invalid template"; e);
 private static String replaceVariables(String input; String version; String versionProperty; Map variables) {
 String template = replaceVariable(input; versionProperty; version);


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