Taming the Three-headed Beast: Understanding Kerberos for Trouble-shooting Hadoop Security

Kerberos takes its name from a three-headed dog in Greek mythology.

Three years ago, I was tasked with migrating the data analysis stack of a company with millions of daily active users from its traditional SQL-based infrastructure to Apache Hadoop. Back then, I considered securing the cluster, although it wasn’t really necessary as the cluster was only accessed internally by the data engineers and…

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