Never mind. I got the solution.
I disabled the default 'welcome' content, which is deployed in the root context by default.
<subsystem xmlns="urn:jboss:domain:web:1.0" default-virtual-server="default-host">
<connector name="http" scheme="http" protocol="HTTP/1.1" socket-binding="http"/>
<virtual-server name="default-host" enable-welcome-root="false">
<alias name="localhost" />
<alias name="example.com" />
</virtual-server>
</subsystem>
Thanks