Failed to get access token – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.2-8.2

Briefly, this error occurs when Elasticsearch is unable to retrieve the access token, which is essential for authentication and authorization. This could be due to incorrect configuration settings, network issues, or expired tokens. To resolve this issue, you can check and correct your Elasticsearch configuration settings, ensure that your network connection is stable, and refresh or renew your access token. Additionally, ensure that the user associated with the token has the necessary permissions to perform the requested operation.

This guide will help you check for common problems that cause the log ” failed to get access token [{}] ” 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 get access token [{}]” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

                                "failed to get access token [{}] because index [{}] is not available";
                        } else {
                            logger.error(new ParameterizedMessage("failed to get access token [{}]"; userTokenId); e);