Loading extensions – How to solve this OpenSearch error

Opster Team

Aug-23, Version: 2.6-2.8

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your OpenSearch operation.

Briefly, this error occurs when OpenSearch is trying to load extensions but can’t find any, hence the empty brackets {}. This could be due to missing or incorrectly configured extensions. To resolve this issue, you can check if the required extensions are properly installed and configured. If they are missing, install them and ensure they are correctly configured. If the extensions are not needed, you can ignore this message as it’s more of an informational message rather than an error.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

This guide will help you check for common problems that cause the log ” Loading extensions : {} ” to appear. To understand the issues related to this log, read the explanation below about the following OpenSearch concepts: .

Log Context

Log “Loading extensions : {}” classname is ExtensionsManager.java.
We extracted the following from OpenSearch source code for those seeking an in-depth context :

     * Load and populate all extensions
    protected void discover() throws IOException {
        logger.info("Loading extensions : {}"; extensionsPath);
        if (!FileSystemUtils.isAccessibleDirectory(extensionsPath; logger)) {

        List extensions = new ArrayList();


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?

Get expert answers on Elasticsearch/OpenSearch