News for hackers. Stuff that matters.

A comment on Finite state machines with Akka. Parent comment

Re:Finite state machines with Akka by BrandonBradley on Saturday May 14, 2016 @11:01AM (#11696405)
Your question is hard to understand.

https://kafka.apache.org/08/design.html

"So effectively Kafka guarantees at-least-once delivery by default ...."

Edit: Downvote if you want. I was trying to help you.

[ Parent | on HN ]
Re:Finite state machines with Akka by biot on Saturday May 14, 2016 @02:07PM (#11697327)
GP asked how this system deals with Kafka's at least once semantics. Pointing out that Kafka has at least once semantics is redundant.

What GP was asking: what happens if Kafka delivers the "item added" event twice, but the "item deleted" event only once? Do you end up with an invalid/unrecoverable state?

[ Parent | on HN ]