title: What consumer group does kafka-console-consumer use
body: <p>When i run kafka-console-consumer like so</p>
  
  <pre><code>bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic test
  </code></pre>
  
  <p>What consumer group does it default to? Does it end up using a random consumer group if I don't specify consumer group or link to consumer properties in the command line? How can I check what consumer group was used?</p>
  
  <p>Thanks!</p>