Clojurians Log v2

hi is there a way to rollback system if one of the keys fails?

or how one is doing it? For instance, :http depends on :db, :db initialized as connection pool, then :http fails for some reason - but connection pool is not closed how I can ensure it is closed?

UPD, found system attached to ex-data

Probably is a good idea to add note about this to docs?