title: Why __consumer_offsets topic in kafka is not spreading to all the brokers?
body: <p>I have a <strong>3 zk</strong> nodes cluster. And <strong>7 kafka broker</strong> nodes.</p>
  
  <p>So when I create any topic then I can set replica factor and no of partitions using command line arguements. </p>
  
  <p>And these partitions are spread to all the 7 brokers.But there is one topic i.e. <code>__consumer_offsets</code>,it is created automatically and  it is spreading to only 1 broker(id=0) with 1 replication.</p>
  
  <p>I am aware that I could change the default no of replication factor in config file.</p>
  
  <p>But, this topic is replicated to only one broker. So what is the parameter which could be changed to replicate the partitions to all the brokers.</p>