Failed to get token – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.2

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

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

                        // the token is not valid
                        if (isShardNotAvailableException(e)) {
                            logger.warn("failed to get access token because index is not available");
                        } else {
                            logger.error(new ParameterizedMessage("failed to get token [{}]"; userToken.getId()); e);


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