>JMSContext.DUPS_OK_ACKNOWLEDGE</code>. The session will be non-transacted and messages received by this session will
 be acknowledged automatically according to the value of <code>acknowledgeMode</code>. For a definition of the meaning of
 these acknowledgement modes see the links below. The values <code>JMSContext.SESSION_TRANSACTED</code> and
 <code>JMSContext.CLIENT_ACKNOWLEDGE</code> may not be used.
 </ul></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>userName</code> - the 