Loaded plugin – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.8-8.9

Briefly, this error occurs when Elasticsearch successfully loads a plugin. It’s not an error message but an informational message indicating that a plugin has been loaded correctly. If you see this message, it means your plugin is installed and working properly. If you didn’t intend to load a plugin, check your Elasticsearch configuration and remove any unwanted plugins. If a plugin is causing issues, consider updating it, replacing it, or seeking support from the plugin’s developer.

This guide will help you check for common problems that cause the log ” loaded plugin [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin, plugins.

Log Context

Log “loaded plugin [{}]” classname is PluginsService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

        // but for now: just be transparent so we can debug any potential issues
        for (String name : loadedPlugins.keySet()) {
            if (moduleNameList.contains(name)) {
                logger.info("loaded module [{}]"; name);
            } else {
                logger.info("loaded plugin [{}]"; name);

    // package-private for testing


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