Failed to read authentication – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 6.8-8.9

Briefly, this error occurs when Elasticsearch is unable to read or process the authentication details provided. This could be due to incorrect credentials, a misconfigured authentication system, or issues with the security plugin. To resolve this, you can verify the credentials and ensure they are correct. Also, check the configuration of your authentication system to ensure it’s set up correctly. If you’re using a security plugin, ensure it’s compatible with your Elasticsearch version and properly configured. Lastly, check the Elasticsearch logs for more detailed error information.

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

    public Authentication getAuthentication() {
        try {
            return authenticationSerializer.readFromContext(threadContext);
        } catch (IOException e) {
            logger.error("failed to read authentication"; e);
            throw new UncheckedIOException(e);

    public AuthorizationEngine.AuthorizationInfo getAuthorizationInfoFromContext() {