'java.lang.IllegalStateException: Authorization Manager is null' error in JBoss EAP 5.

Issue

• While deploying a WAR (which works on JBoss 4.3) to JBoss 5,the following exceptions can be seen

java.lang.ClassCastException: org.jboss.security.plugins.JaasSecurityManager cannot be cast to org.jboss.security.AuthorizationManager
             at org.jboss.security.integration.JNDIBasedSecurityManagement.getAuthorizationManager(JNDIBasedSecurityManagement.java:166)
             at org.jboss.security.plugins.JBossSecurityContext.getAuthorizationManager(JBossSecurityContext.java:268)
            ...
    java.lang.IllegalStateException: Authorization Manager is null
             at org.jboss.security.plugins.javaee.WebAuthorizationHelper.hasUserDataPermission(WebAuthorizationHelper.java:185)
             at org.jboss.web.tomcat.security.JBossWebRealm.hasUserDataPermission(JBossWebRealm.java:643)
             at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:461)
            ...