Why EAP6 throws IllegalArgumentException Empty name segment is not allowed for security-domain ?

Issue

• We are migrating to JBoss EAP 6 from JBoss EAP 5 and JBoss throws Empty name segment is not allowed for security-domain ?
• Why EAP6 throws IllegalArgumentException ?

Caused by: java.lang.IllegalArgumentException: Empty name segment is not allowed for security-domain
        at org.jboss.msc.service.ServiceName.of(ServiceName.java:85) [jboss-msc-1.0.2.GA-redhat-2.jar:1.0.2.GA-redhat-2]
        at org.jboss.msc.service.ServiceName.append(ServiceName.java:112) [jboss-msc-1.0.2.GA-redhat-2.jar:1.0.2.GA-redhat-2]
        at org.jboss.as.web.deployment.WarDeploymentProcessor.processDeployment(WarDeploymentProcessor.java:275)
        at org.jboss.as.web.deployment.WarDeploymentProcessor.deploy(WarDeploymentProcessor.java:117)
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:116) [jboss-as-server-7.1.3.Final-redhat-4.jar:7.1.3.Final-redhat-4]
        ... 5 more