title: Aurora Instances are always pending status after submitted Heron Topology
body: <p>I was deployed a Twitter Heron cluster with Aurora and Mesos. The components of the cluster as following list:</p>
  <ol>
  <li>Scheduler: Aurora scheduler</li>
  <li>State Manager: zookeeper</li>
  <li>Uploader: HDFS</li>
  </ol>
  <p>The instances of Aurora are always pending status after I submitted the example topology named WordCountTopology. The following is a screenshot of the cluster running. <br/></p>
  <blockquote>
  <p>Mesos agents:</p>
  </blockquote>
  <p><a href="https://i.stack.imgur.com/C0S1B.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/C0S1B.png" alt="enter image description here" /></a></p>
  <blockquote>
  <p>Aurora scheduler:</p>
  </blockquote>
  <p><a href="https://i.stack.imgur.com/P9tQ1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/P9tQ1.png" alt="enter image description here" /></a></p>
  <p>Where is the problem? Is the machine's resources in the cluster can not meet the needs the tasks of togology? Thanks for your help.</p>