Error deleting template – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.2

Briefly, this error occurs when Elasticsearch fails to delete an index template due to reasons such as incorrect template name, insufficient permissions, or connectivity issues. To resolve this, ensure the template name is correct and exists. Check if the user has the necessary permissions to delete templates. Also, verify the Elasticsearch cluster’s health and connectivity. If the issue persists, consider restarting the Elasticsearch service.

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 deleting template [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                public void onFailure(Exception e) {
                    if (e instanceof IndexTemplateMissingException == false) {
                        // we might attempt to delete the same template from different nodes - so that's ok if template doesn't exist
                        // otherwise we need to warn
                        logger.warn(new ParameterizedMessage("Error deleting template [{}]"; template); e);


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