Failed to retrieve user – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.2

Briefly, this error occurs when Elasticsearch is unable to fetch user details from its database. This could be due to incorrect user credentials, network issues, or problems with the user database. To resolve this, you can verify the user credentials, check the network connection, or inspect the user database for any inconsistencies or corruption. If the problem persists, consider restarting the Elasticsearch service or, in extreme cases, restoring the user database from a backup.

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 :

                                    new ParameterizedMessage("could not retrieve user [{}] because security index does not exist"; user);
                            } 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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