[jira] [Created] (KAFKA-12355) Consider inter-broker authentication error handling

["Jason Gustafson (Jira)" <ji...@apache.org>]

Jason Gustafson created KAFKA-12355:
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             Summary: Consider inter-broker authentication error handling
                 Key: KAFKA-12355
                 URL: https://issues.apache.org/jira/browse/KAFKA-12355
             Project: Kafka
          Issue Type: Improvement
            Reporter: Jason Gustafson


Currently authentication errors between brokers are generally considered retriable. The broker will log an error, but continue trying to reach the other broker. This could be improved. 

For example, authentication errors (specifically from the broker to controller in KIP-500) should probably be considered fatal during some window during initialization. This makes it easy for users to detect problems quickly. 

On the other hand, if a broker has been running for some time, we probably do not want to fail it on the first authentication failure. If a user had added a misconfigured controller to the cluster, it could end up taking down the whole cluster through authentication failures. 





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