Kafka 0.8 producer can't specify zk.connect without specifying broker.list

[Jun Guo -X (jungu - CIIC at Cisco)]

Hi all,
       I find that in Kafka 0.72, we can specify either zk.connect or 
broker.list. But in Kafka 0.8, we can only specify broker.list ,and we can't 
specify zk.connect without specifying broker.list. I think, in this case, we 
can't balance producer through zookeeper. If anyone use Kafka 0.8, or have some 
understanding with that?
       Many thanks!
Best Regard