title: NIFI - Transfer relationship not specified
body: <p>I've deployed a simple dataflow: <code>HandleHttpRequest</code> - <code>PutKafka</code> - <code>HandleHttpResponse</code>.</p>
  
  <p>NIFI throws a "transfer relationship not specified" error, but not always. Can anyone help me to understand why?</p>
  
  <p>Here is the error information:</p>
  
  <pre><code>2016-05-23 14:57:00,126 ERROR [Timer-Driven Process Thread-104] o.a.n.p.standard.HandleHttpRequest HandleHttpRequest[id=3858f0ad-b165-427b-a460-67fbf7cff0d8] HandleHttpRequest[id=3858f0ad-b165-427b-a460-67fbf7cff0d8] failed to process due to 
  org.apache.nifi.processor.exception.FlowFileHandlingException: 
  
  StandardFlowFileRecord[uuid=ce7c98ae-d7f5-47ea-8a32-6a3834c85720,claim=StandardContentClaim 
  [resourceClaim=StandardResourceClaim[id=1464006858837-110, container=default, section=110], offset=452435, length=0],offset=0,name=277074787796569,size=0] transfer relationship not specified; rolling back session: org.apache.nifi.processor.exception.FlowFileHandlingException: 
  
  StandardFlowFileRecord[uuid=ce7c98ae-d7f5-47ea-8a32-6a3834c85720,claim=StandardContentClaim   
  [resourceClaim=StandardResourceClaim[id=1464006858837-110, container=default, section=110], offset=452435, length=0],offset=0,name=277074787796569,size=0] transfer relationship not specified
  org.apache.nifi.processor.exception.FlowFileHandlingException: 
  
  StandardFlowFileRecord[uuid=ce7c98ae-d7f5-47ea-8a32-6a3834c85720,claim=StandardContentClaim [resourceClaim=StandardResourceClaim[id=1464006858837-110, container=default, section=110], offset=452435, length=0],offset=0,name=277074787796569,size=0] transfer relationship not specified
  2016-05-23 14:57:00,127 ERROR [Timer-Driven Process Thread-104] o.a.n.p.standard.HandleHttpRequest HandleHttpRequest[id=3858f0ad-b165-427b-a460-67fbf7cff0d8] 
  
  Failed to process session due to org.apache.nifi.processor.exception.FlowFileHandlingException: 
  
  StandardFlowFileRecord[uuid=ce7c98ae-d7f5-47ea-8a32-6a3834c85720,claim=StandardContentClaim 
  [resourceClaim=StandardResourceClaim[id=1464006858837-110, container=default, section=110], offset=452435, length=0],offset=0,name=277074787796569,size=0] transfer relationship not specified: org.apache.nifi.processor.exception.FlowFileHandlingException: 
  
  StandardFlowFileRecord[uuid=ce7c98ae-d7f5-47ea-8a32-6a3834c85720,claim=StandardContentClaim [resourceClaim=StandardResourceClaim[id=1464006858837-110, container=default, section=110], offset=452435, length=0],offset=0,name=277074787796569,size=0] transfer relationship not specified
  org.apache.nifi.processor.exception.FlowFileHandlingException: 
  
  StandardFlowFileRecord[uuid=ce7c98ae-d7f5-47ea-8a32-6a3834c85720,claim=StandardContentClaim    [resourceClaim=StandardResourceClaim[id=1464006858837-110, container=default, section=110], offset=452435, length=0],offset=0,name=277074787796569,size=0] transfer relationship not specified
  </code></pre>
  
  <p>Here follows an image of the error:</p>
  
  <p><img src="https://i.stack.imgur.com/esDYl.png" alt="HandleHttpRequest Error"></p>
  
  <p>Thanks a lot.</p>