I don't know about Flink or Spark, but streaming joins is a use case Apache Samza was explicitly designed to handle. It uses node-local caching to make the join

I don't know about Flink or Spark, but streaming joins is a use case Apache Samza was explicitly designed to handle. It uses node-local caching to make the join efficient, and persists the cache updates in Kafka to make the cache persist across node failures.