Adding template for index patterns – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when OpenSearch is trying to add a template for a specific index pattern, but it encounters an issue. This could be due to a variety of reasons such as incorrect syntax, missing or invalid template, or insufficient permissions. To resolve this, ensure that the template syntax is correct and valid. Also, check if the user has the necessary permissions to add a template. If the issue persists, try to restart the OpenSearch service. Lastly, ensure that the index pattern specified in the template matches the indices in your OpenSearch cluster.

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

Log Context

Log “adding template [{}] for index patterns {}” classname is
We extracted the following from OpenSearch source code for those seeking an in-depth context :

            return currentState;

        Metadata.Builder builder = Metadata.builder(currentState.metadata()).put(template);"adding template [{}] for index patterns {}";; request.indexPatterns);
        return ClusterState.builder(currentState).metadata(builder).build();

     * Finds index templates whose index pattern matched with the given index name. In the case of


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