Username is a required option – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is configured to use security features, but the username is not provided in the configuration. Elasticsearch requires authentication details to access secured clusters. To resolve this issue, you can either provide the required username in the Elasticsearch configuration file or pass it as a parameter in the command line while starting Elasticsearch. Also, ensure that the user has the necessary permissions to perform the intended operations.

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

Log Context

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

 throw new ElasticsearchParseException("unsupported token [" + token + "]");
 }  if (username == null) {
 throw new ElasticsearchParseException("username is a required option");
 }  return new BasicAuth(username; password);


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