Failed to read secondary authentication – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 7.7-8.9

Briefly, this error occurs when Elasticsearch is unable to read the secondary authentication, which is often due to incorrect or missing credentials. This could be a result of misconfiguration in the security settings. To resolve this issue, you can: 1) Verify the secondary authentication credentials and ensure they are correct and properly configured. 2) Check the Elasticsearch security settings and ensure they are correctly set up. 3) If the problem persists, consider resetting the secondary authentication credentials. Always ensure to keep your Elasticsearch version updated to avoid such issues.

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

    public SecondaryAuthentication getSecondaryAuthentication() {
        try {
            return SecondaryAuthentication.readFromContext(this);
        } catch (IOException e) {
            logger.error("failed to read secondary authentication"; e);
            throw new UncheckedIOException(e);

    public ThreadContext getThreadContext() {


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