title: Kafka rest proxy: can I have two consumer instances in one consumer group
body: <p>I'm using Kafka 0.10 REST proxy service, I have the following questions please:</p>
  
  <p>1, Can I have two consumer instances in the same consume group?</p>
  
  <p>2, How long the timeout of consumer instance once it was created or last used?</p>
  
  <p>3, Is there Java or Python API for using Kafka REST APIs?</p>