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Motivation

As Flink clusters using Kerberos authenticated services (just talking to HDFS, HBase, Kerberos enabled Kafka or even running on YARN) scale to hundreds of nodes we will inevitably hit a scalability challenge with Kerberos authentication. In Spark Streaming this became a limitation at around 200 node clusters and led to job and cluster outages due to denied authentication by the Kerberos Key Distribution Center (KDC). We can build on the implementation and lessons learned by the Spark community before this becomes an issue.

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