 <p>The response sent by the <code>ResourceManager</code> to a client
 * requesting a {@link NodeReport} for all nodes.</p>
 * 
 * <p>The <code>NodeReport</code> contains per-node information such as 
 * available resources, number of containers, tracking url, rack name, health
 * status etc.
 <p>The response sent by the <code>ResourceManager</code> to a client
 * requesting a {@link NodeReport} for all nodes.</p>
 * 
 * <p>The <code>NodeReport</code> contains per-node information such as 
 * available resources, number of containers, tracking url, rack name, health
 * status etc. | GetClusterNodesResponse.java