Failed to load plugin from – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.

Briefly, this error occurs when Elasticsearch is unable to load a plugin, which can be due to a missing plugin or an issue with the plugin itself. To resolve this issue, you can try to install the missing plugin, or check the plugin for errors.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

This guide will help you check for common problems that cause the log ” Failed to load plugin from ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin and plugins.

Log Context

Log “failed to load plugin from [” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                    PluginInfo pluginInfo = new PluginInfo(; plugin.description(); isSite; true; pluginVersion);

                    plugins.add(new Tuple(pluginInfo; plugin));
                } catch (Throwable e) {
                    logger.warn("failed to load plugin from [" + pluginUrl + "]"; e);
                } finally {
        } catch (IOException e) {


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