title: Lock duration significance on azure service bus topic subscriptions
body: <p>I have been looking at lockdurations and renewlock mechanisms for service bus queue and topics. However it is not clear about what exactly does lock duration mean for topic subscriptions.</p>
  
  <p>For example:</p>
  
  <p>If i have a topic GameScoreUpdate and it has multiple subscribers.</p>
  
  <p>So any message to this topic will be delivered to all the subscribers.</p>
  
  <p>now if On one subscription "Subscription1", i have a lock duration of 30 seconds. but message processing is not complete.then the lock expires?</p>
  
  <p>What happens after this? the other subscribers have already been delivered this message. current subscriber is processing the message.</p>
  
  <p>Whats the significance of lockduration in this case?</p>