title: SimpleHttpConnectionManager being used incorrectly
body: <p>SimpleHttpConnectionManager being used incorrectly.  Be sure that HttpMethod.releaseConnection() is always called and that only one thread and/or method is using this connection manager at a time.</p>
  
  <p>Does Anyone know why this error shows up and is causes the files I want to download or to fail and retry or to download uncompleted</p>
  
  <p>Thank you ! </p>