title: Kafka - Synchronized Consumer Groups
body: <p>i am trying to make my head regarding Kafka consumers and I'd like to know if the following use case can be solved using Kafka.</p>
  
  <p>My use case is basically this one:</p>
  
  <p>I have a stream that I'd like to be consumed in sync by several consumers. In other words, I have a first consumer that starts to consume the stream, then another consumer arrives later. I'd like this second consumer to start to consume the stream at the offset where is currently the first consumer.</p>
  
  <p>I know that I need to have the consumers in two different groups. But it is not clear for me :</p>
  
  <ul>
  <li>on how or if it is possible to coordinate the groups offset</li>
  <li>if I would expect a latency for such coordination task  </li>
  </ul>