Error deleting template – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch fails to delete a specified index template. This could be due to insufficient permissions, non-existence of the template, or a network connectivity issue. To resolve this, ensure that the user has the necessary permissions to delete templates. Also, verify that the template you’re trying to delete actually exists. If the issue persists, check your network connection to the OpenSearch cluster.

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This guide will help you check for common problems that cause the log ” Error deleting template [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: cluster, template, metadata.

Log Context

Log “Error deleting template [{}]” classname is
We extracted the following from OpenSearch 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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