[haddr]

Totally agree!

Once we were very close to implement a very similar scenario (stream of events, some lightweight processing, kafka for distribution, hbase/solr for storage). If you go for such thing, better be sure that your business analysts are on the same page as you. Otherwise, instead of a clean event sourcing model, you may end up with some sort of message protocol that spans across the schema/data format/business logic/weird requirements. It is just that this thing will become your new "model".