Description of problem:
The webadmin interface can not be opened by browser after ovirt 3.2 was installed on FC18.

Version-Release number of selected component (if applicable):
[root@localhost ~]# rpm -qa |grep engine
ovirt-engine-backend-3.2.0-2.fc18.noarch
ovirt-engine-restapi-3.2.0-2.fc18.noarch
ovirt-engine-cli-3.2.0.7-1.20121212.gitd77dad3.fc18.noarch
ovirt-engine-tools-common-3.2.0-2.fc18.noarch
ovirt-engine-genericapi-3.2.0-2.fc18.noarch
ovirt-engine-setup-3.2.0-2.fc18.noarch
ovirt-engine-sdk-3.2.0.5-1.20121213.gitc0ab704.fc18.noarch
ovirt-engine-webadmin-portal-3.2.0-2.fc18.noarch
ovirt-engine-config-3.2.0-2.fc18.noarch
ovirt-engine-dbscripts-3.2.0-2.fc18.noarch
ovirt-engine-3.2.0-2.fc18.noarch
ovirt-engine-notification-service-3.2.0-2.fc18.noarch
ovirt-engine-userportal-3.2.0-2.fc18.noarch

How reproducible:
Installed the oVirt engine based on the http://www.ovirt.org/Testing/OvirtTestDay and run engine-setup

Steps to Reproduce:
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Actual results:
When the webadmin url was opened, the page told me:

Service Unavailable

The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

Expected results:
The webadmin interfaces should be opened by the browser.

Additional info:
#cat /var/log/ovirt-engine/console.log

Exception in thread "main" java.lang.ExceptionInInitializerError
at org.jboss.as.server.Main.main(Main.java:73)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.jboss.modules.Module.run(Module.java:260)
at org.jboss.modules.Main.main(Main.java:291)
Caused by: java.lang.IllegalStateException: The LogManager was not properly installed (you must set the "java.util.logging.manager" system property to "org.jboss.logmanager.LogManager")
at org.jboss.logmanager.Logger.getLogger(Logger.java:60)
at org.jboss.logmanager.log4j.BridgeRepositorySelector.<clinit>(BridgeRepositorySelector.java:42)
... 7 more
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.jboss.as.server.Main.main(Main.java:73)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.jboss.modules.Module.run(Module.java:260)
at org.jboss.modules.Main.main(Main.java:291)
Caused by: java.lang.IllegalStateException: The LogManager was not properly installed (you must set the "java.util.logging.manager" system property to "org.jboss.logmanager.LogManager")
at org.jboss.logmanager.Logger.getLogger(Logger.java:60)
at org.jboss.logmanager.log4j.BridgeRepositorySelector.<clinit>(BridgeRepositorySelector.java:42)
... 7 more
Exception in thread "main" java.lang.ExceptionInInitializerError
at org.jboss.as.server.Main.main(Main.java:73)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.jboss.modules.Module.run(Module.java:260)
at org.jboss.modules.Main.main(Main.java:291)
Caused by: java.lang.IllegalStateException: The LogManager was not properly installed (you must set the "java.util.logging.manager" system property to "org.jboss.logmanager.LogManager")
at org.jboss.logmanager.Logger.getLogger(Logger.java:60)
at org.jboss.logmanager.log4j.BridgeRepositorySelector.<clinit>(BridgeRepositorySelector.java:42)
... 7 more