Template must not be null – 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 Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Template must not be null ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: template and plugin.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Template must not be null”classname  is TemplateUtils.java We extracted the following from Elasticsearch source code for those seeking an in-depth context :

/**
 * Parses and validates that the source is not empty.
 */
 public static void validate(String source) {
 if (source == null) {
 throw new ElasticsearchParseException("Template must not be null");
 }
 if (Strings.isEmpty(source)) {
 throw new ElasticsearchParseException("Template must not be empty");
 }

 

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