title: camel showing negative in flight exchanges in hawtio
body: <p>I am using camel version 2.24.1. I am reading a CSV and sending those records to the HTTP endpoint with the jetty client. the problem is on hawtio when I look at how many exchanges are in flight, it always shows a negative number. Does anyone why this is happening</p>
  
  <p><a href="https://i.stack.imgur.com/kTrzt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/kTrzt.png" alt="enter image description here"></a></p>