Failed to get access token – How to solve related issues

Opster Team

Feb-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which analyzes 2 JSON files to detect many errors.

Briefly, this error occurs when Elasticsearch is unable to get an access token, which can cause issues with authentication and authorization. To resolve this issue, you can try to check the token generation process for errors, or generate a new token.

To easily locate the root cause and resolve this issue try AutoOps for Elasticsearch & OpenSearch. It diagnoses problems by analyzing hundreds of metrics collected by a lightweight agent and offers guidance for resolving them.

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 :

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


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