title: Kafka does not consume messages
body: <p>I have update my kafka from version 0.10.2.0 to versión 2.1.0 and now kafka is not able to consume messages. I am using spring boot and here is my configuration:</p>
  
  <pre class="lang-java prettyprint-override"><code>configProperties.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, kafkaServers);
  configProperties.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
  configProperties.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, "org.apache.kafka.common.serialization.StringDeserializer");
  configProperties.put(ConsumerConfig.GROUP_ID_CONFIG, topic + "kafka2");
  configProperties.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, false);
  configProperties.put(ConsumerConfig.MAX_PARTITION_FETCH_BYTES_CONFIG, 3000000);
  configProperties.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
  configProperties.put(ConsumerConfig.FETCH_MAX_BYTES_CONFIG, 2000000000);
  configProperties.put(ConsumerConfig.MAX_POLL_INTERVAL_MS_CONFIG, "900000");
  configProperties.put(ConsumerConfig.REQUEST_TIMEOUT_MS_CONFIG, "905000");
  configProperties.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, "35000");
  </code></pre>
  
  <p>I have change the group id, to avoid problems with the old group id. 
  My current version of spring is 2.1.2.RELEASE. And in my application I can see how my client is constantly reconnecting</p>
  
  <p>Any idea of the problem?</p>