Error updating template request was not acknowledged – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch fails to acknowledge an update to an index template. This could be due to a variety of reasons such as network issues, insufficient permissions, or a problem with the template itself. To resolve this issue, you can try the following: 1) Check your network connection and ensure Elasticsearch is running properly. 2) Verify that you have the necessary permissions to update the template. 3) Review the template for any errors or inconsistencies. 4) If the problem persists, consider restarting Elasticsearch or reindexing your data.

In addition we recommend you run the Elasticsearch Template Optimizer to fix problems in your data modeling.

It will analyze your templates to detect issues and improve search performance, reduce indexing bottlenecks and optimize storage utilization. The Template Optimizer is free and requires no installation.

Log Context

Log “Error updating template [{}]; request was not acknowledged” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            client.admin().indices().putTemplate(request; new ActionListener() {
                public void onResponse(AcknowledgedResponse response) {
                    if (response.isAcknowledged() == false) {
                        logger.warn("Error updating template [{}]; request was not acknowledged"; change.getKey());