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

Opster Team

Aug-23, Version: 8.3-8.9

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Briefly, this error occurs when Elasticsearch is unable to retrieve the access token associated with the userTokenId. This could be due to incorrect userTokenId, expired token, or connectivity issues with the authentication server. To resolve this, you can verify the userTokenId, refresh the token if it’s expired, or check the connection to the authentication server. If the issue persists, you may need to check the Elasticsearch logs for more detailed error information.

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This guide will help you check for common problems that cause the log ” failed to get access token [” + userTokenId + “] ” 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 [” + userTokenId + “]” 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(() -> "failed to get access token [" + userTokenId + "]"; e);


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