title: main thread load tensorflow model, used in child thread error
body: <p>main thread load tensorflow model, used in child thread error.</p>
  
  <p>I create two thread, one is main thread, is used for load model,</p>
  
  <p>then create child thread, and pass load model return value to child thread。</p>
  
  <p>But，when child thread use the parameter to do inference</p>