Removing 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 attempts to remove a template that doesn’t exist or is already deleted. This could be due to a misconfiguration or a timing issue where multiple processes are trying to delete the same template. To resolve this, ensure that the template you’re trying to delete actually exists. If it does, check if there are any processes that could be trying to delete the template at the same time. If the error persists, you may need to debug your OpenSearch cluster to identify any underlying issues.

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This guide will help you check for common problems that cause the log ” removing 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 “removing template [{}]” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

                    throw new IndexTemplateMissingException(;
                Metadata.Builder metadata = Metadata.builder(currentState.metadata());
                for (String templateName : templateNames) {
          "removing template [{}]"; templateName);
                return ClusterState.builder(currentState).metadata(metadata).build();


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