Wildfly: Jboss error on start-up
<p>I am having trouble starting my jboss with      </p>

<pre><code>./standalone.sh 
</code></pre>

<p>in the directory </p>

<pre><code>/ali/wildfly-9.0.1.Final/bin$. 
</code></pre>

<p>It  throws the following error</p>

<pre><code> 15:01:37,824 ERROR [org.jboss.as.controller.management-operation]       
(Controller Boot Thread) WFLYCTL0013: Operation ("add") failed - address: 
([("deployment" =&gt; "HelloServlet.war")]) - failure description: 
"WFLYCTL0212: Duplicate resource [(\"deployment\" =&gt; \"HelloServlet.war
\")]"
15:01:37,830 FATAL [org.jboss.as.server] (Controller Boot Thread) 
WFLYSRV0056: Server boot has failed in an unrecoverable manner; exiting. 
</code></pre>