title: Slave nodes not in Yarn ResourceManager
body: <p>I've set up a 3 node Apache Hadoop cluster. On master node, I can see </p>
  
  <pre><code>[hadoop-conf]$ jps
  16856 DataNode
  17051 SecondaryNameNode
  16701 NameNode
  21601 ResourceManager
  21742 NodeManager
  18335 JobHistoryServer
  </code></pre>
  
  <p>and on slave nodes, I see</p>
  
  <pre><code>[fedora20-template dfs]$ jps
  28677 Jps
  28510 NodeManager
  27449 DataNode
  </code></pre>
  
  <p>I can see three live nodes from master:50070. However, in the ResourceManager Web UI (<a href="http://master:8088/cluster/nodes">http://master:8088/cluster/nodes</a>), I can see only master node. Why are the two slave nodes not in the resource manager? Does that mean they are not part of resources that are used to do mapreduce?</p>