Hi, We are submitting critical UserGroupInformation credentials and wanted to know how these are protected in Spark Cluster.
Questions: Are the credentials persisted to disk at any point? If so, where? If they are persisted, are they encrypted? Or just obfuscated? is the encryption key accessible? Are they only protected by file permissions? Are they only in memory? How would you securely propagate UGI / credentials to spark executors? Regards, Tim
