Component template existing == null adding updating – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 1-2.9

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Briefly, this error occurs when there’s an attempt to add or update a component template in OpenSearch, but the operation fails due to some issues. The issues could be related to incorrect template syntax, insufficient permissions, or conflicts with existing templates. To resolve this, ensure the template syntax is correct, the user has the necessary permissions, and there are no conflicts with existing templates. Also, consider checking the OpenSearch logs for more detailed error information.

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

            if (validationFailure != null) {
                throw validationFailure;
        }"{} component template [{}]"; existing == null ? "adding" : "updating"; name);
        return ClusterState.builder(currentState)
            .metadata(Metadata.builder(currentState.metadata()).put(name; finalComponentTemplate))


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