gaborgsomogyi commented on issue #24204: [SPARK-27270][SS] Add Kafka dynamic JAAS authentication debug possibility URL: https://github.com/apache/spark/pull/24204#issuecomment-476531892 It provides different kind of debug log entries just like `HADOOP_JAAS_DEBUG`. Please see [doc](https://www.cloudera.com/documentation/enterprise/5-9-x/topics/sg_kerberos_troubleshoot.html#concept_ngz_wjd_sw) (I know its CM but not found better) and the [code](https://github.com/apache/hadoop/blob/a55d6bba71c81c1c4e9d8cd11f55c78f10a548b0/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/token/delegation/ZKDelegationTokenSecretManager.java#L270). > I'm seeing some value to enable the option to only Kafka side instead of global (since that option normally brings verbose messages), but no strong opinion. My change turns on debug messages only on Kafka related authentications. Not really sure what flag do you mean.
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