Putting template was not acknowledged – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-6.8

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Briefly, this error occurs when Elasticsearch does not acknowledge the addition of a new template. This could be due to a variety of reasons such as insufficient permissions, network issues, or a misconfigured Elasticsearch cluster. To resolve this issue, you can check the user permissions, ensure the network connectivity is stable, and verify the Elasticsearch cluster configuration. Additionally, you can also check the Elasticsearch logs for more detailed error information.

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This guide will help you check for common problems that cause the log ” Putting [{}] template was not acknowledged ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, template, upgrade.

Log Context

Log “Putting [{}] template was not acknowledged” class name is Upgrade.java. We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 return ActionListener.wrap(
 r -> {
 if (r.isAcknowledged()) {
 } else {
 listener.onFailure(new ElasticsearchException("Putting [{}] template was not acknowledged"; name));


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