Invalid grant – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when there is an issue with the authentication process in Elasticsearch. It typically means that the access token used for OAuth 2.0 authentication is either expired, revoked, or invalid. To resolve this issue, you can try refreshing the access token, ensuring the correct token is being used, or re-authenticating the user. If the problem persists, check your Elasticsearch security settings and ensure that the OAuth 2.0 setup is correctly configured.

This guide will help you check for common problems that cause the log ” invalid_grant ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “invalid_grant” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 * Creates an {@link ElasticsearchSecurityException} that indicates the request contained an invalid grant
 private static ElasticsearchSecurityException invalidGrantException(String detail) {
 ElasticsearchSecurityException e = new ElasticsearchSecurityException("invalid_grant"; RestStatus.BAD_REQUEST);
 e.addHeader("error_description"; detail);
 return e;
 }  private static ElasticsearchSecurityException unableToPerformAction(@Nullable Throwable cause) {


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