Failed to retrieve user – How to solve related issues

Opster Team

Jan-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.

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 retrieve user ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “Failed to retrieve user [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                                     if (t instanceof IndexNotFoundException) {
                                                (org.apache.logging.log4j.util.Supplier>) () -> new ParameterizedMessage(
                                                        "could not retrieve user [{}] because security index does not exist"; user); t);
                                    } else {
                                        logger.error(new ParameterizedMessage("failed to retrieve user [{}]"; user); t);
                                    // We don't invoke the onFailure listener here; instead
                                    // we call the response with a null user


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