[suresk]

Pulsar definitely looks like a great combo of capabilities from Kafka + AMQP. I have been wanting to try it out with some of our stuff, but inertia/time constraints have made it hard to consider moving away from Rabbit.

I'm curious what makes it go on your "never again" list? We've definitely had our fair share of issues with it, namely -

- Really easy to misconfigure queues/exchanges, especially trying to do something like have a retry + DLQ setup.

- If you have a queue build up to a large number of messages (100 million+) for whatever reason, purging it will probably bring down the cluster.

Overall, our experience has been mostly positive. It isn't on my "never again" list, but I'm definitely wary of some parts of it and it is on my list of one of the more difficult pieces of our infrastructure to scale.