title: Adding new jar files to web application without restarting it
body: <p>I have a <code>Java EE</code> web application which is running on 2 node cluster of <code>WAS 7.0.</code> This web application has multiple jar files, where in each jar file contains a list of utilities. I might add <strong><em>new</em></strong> jar files in future to this web application. <strong>We don't want downtime of this web application when we add new jars to it.</strong></p>
  
  <p>Is it possible to add new jar files to the web application without restarting it? Will the changes take effect instantly?</p>
  
  <p>How do I update an existing jar file which is already loaded by the class loaded? Is it possible to do that without restarting it?</p>
  
  <p>I read about something called <code>Hot deployment</code> in WAS. They have mentioned, <code>Hot Deployment</code> doesn't work on Solaris and HP-UX OSs.</p>
  
  <p>Could you please suggest the best ways to approach this problem?</p>