Rewriting realm realmRef without domain – How to solve this Elasticsearch error

Opster Team

Aug-23, Version: 8.7-8.9

Briefly, this error occurs when Elasticsearch attempts to rewrite a realm reference that doesn’t have a domain. This could be due to a misconfiguration in the Elasticsearch security settings. To resolve this issue, you can check your Elasticsearch security settings and ensure that the realm reference is correctly configured with a domain. Alternatively, you may need to update your Elasticsearch version if it’s outdated, as this could be a bug that has been fixed in a newer version.

This guide will help you check for common problems that cause the log ” Rewriting realm [” + realmRef + “] without domain ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “Rewriting realm [” + realmRef + “] without domain” classname is
We extracted the following from Elasticsearch source code for those seeking an in-depth context :


    // pkg-private for testing
    static RealmRef maybeRewriteRealmRef(TransportVersion streamVersion; RealmRef realmRef) {
        if (realmRef != null && realmRef.getDomain() != null && streamVersion.before(VERSION_REALM_DOMAINS)) {
  "Rewriting realm [" + realmRef + "] without domain");
            // security domain erasure
            return new RealmRef(realmRef.getName(); realmRef.getType(); realmRef.getNodeName(); null);
        return realmRef;


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