gaborgsomogyi commented on issue #24204: [SPARK-27270][SS] Add Kafka dynamic JAAS authentication debug possibility URL: https://github.com/apache/spark/pull/24204#issuecomment-480298360 After dealing several weeks with multi-cluster delegation token and facing constant kerberos problems I have 2 conclusions: * I see your point and from user perspective having a new flag is overkill and not convenient at all * Kerberos core provided messages are sometimes cryptic and `Krb5LoginModule` messages shed some lights when got stuck (though this gets better with experience). Considering these if no objection I would turn debug on with the mentioned global flag.
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