title: what is the purpose of default-web-module attribute in host tag in standalone.xml file of wildfly 9?
body: <p>am working on wildfly, </p>
  
  <p>in standalone.xml file i have configured hosts as<br/> <br/>
  <strong>standalone.xml :</strong></p>
  
  <pre><code>&lt;host name="wildflyhost1" alias="test.test1.com" default-web-module="test1.war"/&gt;
  &lt;host name="wildflyhost2" alias="test.test2.com" default-web-module="test2.war"/&gt;
  </code></pre>
  
  <p>My Question is,<br/><br/> default-web-module="test2.war" is mandatory ?<br/>
  what happens when the war file is not available in server deployments ?<br/></p>
  
  <p>Thanks in advance.</p>