Loaded extension with uniqueId extension getUniqueId – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 2.5-2.9

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Briefly, this error occurs when an extension with a unique ID is loaded into OpenSearch. This is not necessarily an error, but more of an informational message indicating that the extension has been successfully loaded. If you’re seeing issues related to this, it could be due to conflicts with other extensions or incorrect configuration. To resolve this, ensure that the extension is compatible with your OpenSearch version, check for conflicts with other extensions, and verify the extension’s configuration settings.

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This guide will help you check for common problems that cause the log ” Loaded extension with uniqueId ” + extension.getUniqueId() + “: ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: .

Log Context

Log “Loaded extension with uniqueId ” + extension.getUniqueId() + “: ” classname is ExtensionsManager.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

        extensionIdMap.put(extension.getUniqueId(); discoveryExtensionNode);
        extensionSettingsMap.put(extension.getUniqueId(); extension);
        logger.info("Loaded extension with uniqueId " + extension.getUniqueId() + ": " + extension);

    private void validateField(String fieldName; String value) throws IOException {
        if (Strings.isNullOrEmpty(value)) {
            throw new IOException("Required field [" + fieldName + "] is missing in the request");


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