HI, 

I recently learning Kafka, there are several problems 

1, ActiveMQ is broker push message, consumer established the messagelistener 
gets the message, but the message in Kafka are consumer pull from broker, 
Timing acquisition from broker    or can build the listener on the broker? 
2, I now have more than one consumer, to consume the same topic, should put 
them in the same group? 

3, this value should be set to zookeeper.session.timeout.ms how much? 400ms 
java example, but will appear  Unable to connect to zookeeper server within 
timeout: 400


panqing...@163.com

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