JBoss ON install fails with "The installer will now exit due to previous errors:" the connection timed out

Issue

• Install fails with below in the rhq-installer.log:

15:39:36,442 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:1101) [rhq-installer-util-4.9.0.JON320GA.jar:4.9.0.JON320GA]
    at org.rhq.enterprise.server.installer.InstallerServiceImpl.preInstall(InstallerServiceImpl.java:217) [rhq-installer-util-4.9.0.JON320GA.jar:4.9.0.JON320GA]
    at org.rhq.enterprise.server.installer.InstallerServiceImpl.test(InstallerServiceImpl.java:142) [rhq-installer-util-4.9.0.JON320GA.jar:4.9.0.JON320GA]
    at org.rhq.enterprise.server.installer.Installer.doInstall(Installer.java:90) [rhq-installer-util-4.9.0.JON320GA.jar:4.9.0.JON320GA]
    at org.rhq.enterprise.server.installer.Installer.main(Installer.java:57) [rhq-installer-util-4.9.0.JON320GA.jar:4.9.0.JON320GA]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.7.0_71]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.7.0_71]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.7.0_71]
    at java.lang.reflect.Method.invoke(Method.java:606) [rt.jar:1.7.0_71]
    at org.jboss.modules.Module.run(Module.java:270) [jboss-modules.jar:1.2.2.Final-redhat-1]
    at org.jboss.modules.Main.main(Main.java:411) [jboss-modules.jar:1.2.2.Final-redhat-1]
Caused by: java.io.IOException: java.net.ConnectException: JBAS012144: Could not connect to remote://127.0.0.1:9999. The connection timed out
    at org.jboss.as.controller.client.impl.AbstractModelControllerClient.executeForResult(AbstractModelControllerClient.java:129) [jboss-as-controller-client-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10]
    at org.jboss.as.controller.client.impl.AbstractModelControllerClient.execute(AbstractModelControllerClient.java:81) [jboss-as-controller-client-7.2.1.Final-redhat-10.jar:7.2.1.Final-redhat-10]
    at org.rhq.common.jbossas.client.controller.JBossASClient.execute(JBossASClient.java:270) [rhq-jboss-as-dmr-client-4.9.0.JON320GA.jar:4.9.0.JON320GA]
    at org.rhq.common.jbossas.client.controller.CoreJBossASClient.getSystemProperties(CoreJBossASClient.java:103) [rhq-jboss-as-dmr-client-4.9.0.JON320GA.jar:4.9.0.JON320GA]
    at org.rhq.enterprise.server.installer.InstallerServiceImpl.testModelControllerClient(InstallerServiceImpl.java:1052) [rhq-installer-util-4.9.0.JON320GA.jar:4.9.0.JON320GA]
    ... 10 more

• server.log shows the EAP server starting but taking more than 30 seconds