Invalid username in users file ; skipping. – How to solve related issues

Opster Team

Jan-20, Version: 1.7-8.0

Before you begin reading this guide, we recommend you run Elasticsearch Error Check-Up which can resolve issues that cause many errors.

This guide will help you check for common problems that cause the log ” Invalid username in users file ; skipping. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: discovery-file and plugin.

Advanced users might want to skip right to the common problems section in each concept or try running the Check-Up to analyze Elasticsearch configuration and help resolve this error.

Log Context

Log “Invalid username [{}] in users file [{}]; skipping… ({})” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :

            String username = line.substring(0; i);
            Validation.Error validationError = Users.validateUsername(username; allowReserved; settings);
            if (validationError != null) {
                logger.error("invalid username [{}] in users file [{}]; skipping... ({})"; username; path.toAbsolutePath();
            String hash = line.substring(i + 1);
            users.put(username; hash.toCharArray());


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