title: Confusing Storm-UI
body: <p>I am confused by the Storm-UI statistics.</p>
  
  <p>For example:</p>
  
  <p><a href="https://i.stack.imgur.com/phPIt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/phPIt.png" alt="Storm-UI"></a></p>
  
  <p><strong>Topology Stats</strong> show a number of 69 million</p>
  
  <p><strong>kafka-spout</strong> shows a number of 34 million</p>
  
  <p><strong>__acker</strong> is at 17 million</p>
  
  <p><strong>es-bolt</strong> shows 17 million too</p>
  
  <p>My toplogy is kafka-spout --> es-bolt and I am not sure how the numbers above add up?</p>
  
  <p>If Kafka-spout is emitting only 34 million, why do topology stats show 69 million?</p>
  
  <p>And again if Kafka-spout emitted 34 million, why does es-bolt say 17 million?</p>
  
  <p>I see a pattern of tuples being halved from top-to-down, but not sure I understand why? Is it because of ack-tuples or heart-beat bolts?</p>
  
  <p>Are they always half of the upstream spout?</p>