Failed to retrieve built in users – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch cannot access or retrieve the built-in users from its internal security index. This could be due to incorrect configuration, network issues, or problems with the Elasticsearch security index. To resolve this issue, you can check the Elasticsearch configuration for any errors, ensure that the network connections are stable and functioning correctly, and verify the health of the Elasticsearch security index. If the security index is corrupted, you may need to restore it from a backup.

This guide will help you check for common problems that cause the log ” failed to retrieve built in users ” 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 built in users” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                        public void onFailure(Exception e) {
                            if (e instanceof IndexNotFoundException) {
                                logger.trace("could not retrieve built in users since security index does not exist"; e);
                            } else {
                                logger.error("failed to retrieve built in users"; e);


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