title: Kafka Spout fails to acknowledge message in storm while setting multiple workers
body: <p>I have a storm topology that subscribes events from Kafaka queue. The topology works fine while the number of workers config.setNumWorkers is set to 1. When I update the number of workers to more than one or 2, the KafkaSpout fails to acknowledge the messages while looking at storm UI. What might be the possible cause, I am not able to figure out, the exactness of problem. </p>
  
  <p>I have a 3 node cluster running one nimbus and 2 supervisors. </p>