Briefly, this error occurs when Elasticsearch cannot authenticate a user using the configured security realms. This could be due to incorrect credentials, misconfigured realms, or issues with the authentication service. To resolve this, ensure that the user credentials are correct. If they are, check the configuration of your realms and make sure they are set up correctly. If the problem persists, investigate the health and connectivity of your authentication service.
This guide will help you check for common problems that cause the log ” Authentication failed using realms [{}]. ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “Authentication failed using realms [{}].” classname is AuthenticationService.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
final String cause = tuple.v2() == null ? "" : " (Caused by " + tuple.v2() + ")";
logger.warn("Authentication to realm {} failed - {}{}"; realm.name(); message; cause);
});
List unlicensedRealms = realms.getUnlicensedRealms();
if (unlicensedRealms.isEmpty() == false) {
logger.warn("Authentication failed using realms [{}]." +
" Realms [{}] were skipped because they are not permitted on the current license";
Strings.collectionToCommaDelimitedString(defaultOrderedRealmList);
Strings.collectionToCommaDelimitedString(unlicensedRealms));
}
logger.trace("Failed to authenticate request [{}]"; request);
