Cannot obtain client connection to the RHQ app server!! while installing JBoss ON server

Issue

• Receiving below when trying to install JBoss ON

14:05:25,355 ERROR [org.rhq.enterprise.server.installer.Installer] The installer will now exit due to previous errors: java.lang.Exception: Cannot obtain client connection to the RHQ app server!!
    at org.rhq.enterprise.server.installer.InstallerServiceImpl.testModelControllerClient(InstallerServiceImpl.java:1337) [rhq-installer-util-4.12.0.JON330GA.jar:4.12.0.JON330GA]
    at org.rhq.enterprise.server.installer.InstallerServiceImpl.preInstall(InstallerServiceImpl.java:320) [rhq-installer-util-4.12.0.JON330GA.jar:4.12.0.JON330GA]
    at org.rhq.enterprise.server.installer.InstallerServiceImpl.test(InstallerServiceImpl.java:245) [rhq-installer-util-4.12.0.JON330GA.jar:4.12.0.JON330GA]
    at org.rhq.enterprise.server.installer.Installer.doInstall(Installer.java:96) [rhq-installer-util-4.12.0.JON330GA.jar:4.12.0.JON330GA]
    at org.rhq.enterprise.server.installer.Installer.main(Installer.java:59) [rhq-installer-util-4.12.0.JON330GA.jar:4.12.0.JON330GA]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_65]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_65]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_65]
    at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_65]
    at org.jboss.modules.Module.run(Module.java:312) [jboss-modules.jar:1.3.3.Final-redhat-1]
    at org.jboss.modules.Main.main(Main.java:460) [jboss-modules.jar:1.3.3.Final-redhat-1]
Caused by: java.io.IOException: java.net.ConnectException: JBAS012174: Could not connect to remote://127.0.0.1:9999. The connection failed