So Flink differentiates in stream processing in two major ways: - Flink guarantees exactly once stream processing through a barrier checkpointing system. - Fl

So Flink differentiates in stream processing in two major ways: - Flink guarantees exactly once stream processing through a barrier checkpointing system. - Flink has very detailed APIs for handling state and doing stateful stream processing. Additionally, Flink has one of the most active communities in the Apache Software Foundation: https://blogs.apache.org/foundation/entry/the-apache-software-foundation-announces55 https://blogs.apache.org/foundation/entry/the-apache-softwar... In situations where you want to create a streaming application with persistent state you might choose Flink over spark streaming.