ltorg

I'm actually quite happy to see that other people are also facing similar problems with event-sourced microservices. The project that I'm on (currently working for a neo-bank) has been trying to use event-sourcing from the get go, and oh god, is it a mess. The project has been going on for awhile and some of the devs thought it a good idea to focus on scalability and all the other metrics that don't matter.

As your data evolves and your schema changes, you'll have a mix of messages of both the old and new schema in the same topic. You now have to change your consumer services to make sure you can handle the new schema as well as the old schema if they are important (think reconsuming in Kafka). Your code then gets really ugly having to handle OldXXXEvent NewXXXEvent and loads of if-else statements sprinkled in the code base. Either that, or migrate your data to a new topic which is a one-off exercise that takes time which you'll then have to do for different environments.

I'm sure event sourcing has its place but I'm not entirely convinced the approach is necessarily better than just plain ol' database which would have saved us more time and get our product out quicker.