Template must not be null – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your Elasticsearch operation.

Briefly, this error occurs when Elasticsearch tries to create or update an index template but the template provided is null or empty. This could be due to a programming error or incorrect API usage. To resolve this issue, ensure that the template you’re trying to create or update is correctly defined and not null. Check your code or API call to make sure you’re passing a valid template. If you’re using a file to define the template, ensure the file exists and is correctly formatted.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

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: plugin, template.

Log Context

Log “Template must not be null” class name 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");
 }

 

How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?