Extensions yml file is not present No extensions will be loaded – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 2.5-2.8

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Briefly, this error occurs when the OpenSearch engine cannot locate the extensions.yml file, which is used to load any extensions. This could be due to the file being deleted, misplaced, or not properly configured. To resolve this issue, you can either recreate the extensions.yml file if it was deleted, move it to the correct directory if misplaced, or correct the file’s configuration if it’s improperly set up. Also, ensure that OpenSearch has the necessary permissions to access the file.

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This guide will help you check for common problems that cause the log ” Extensions.yml file is not present. No extensions will be loaded. ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: .

Log Context

Log “Extensions.yml file is not present. No extensions will be loaded.” classname is ExtensionsManager.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

            if (!extensionIdMap.isEmpty()) {
                logger.info("Loaded all extensions");
        } else {
            logger.warn("Extensions.yml file is not present.  No extensions will be loaded.");

     * Loads a single extension


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