title: waiting for AM container to be allocated, launched and register with RM
body: <p>When I started hadoop example wordcount, it stuck at 'Running job: job_1502778007453_0001'. The following pictures show the detail:
  <a href="https://i.stack.imgur.com/hX3z2.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/hX3z2.png" alt="enter image description here"></a></p>
  
  <p>And the log shows that there is 0 MB allocated:
  <a href="https://i.stack.imgur.com/1scbK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1scbK.png" alt="enter image description here"></a></p>
  
  <p>I have tried many methods related to this but none of them work. Does anyone know how to figure it out?</p>