Getting java.lang.NullPointerException in TAMLoginModule when configured in EAP 6

Issue

• Getting java.lang.NullPointerException in com.ibm.security.websso.TAMLoginModule when configured in EAP 6:-

JBAS018214: Error during login/password authenticate: java.lang.NullPointerException
    at com.tivoli.pd.jutil.nb.a(Unknown Source) [PD.jar:]
    at com.tivoli.pd.jutil.nb.a(Unknown Source) [PD.jar:]
    at com.tivoli.pd.jazn.PDPrincipal.toString(Unknown Source) [PD.jar:]
    at java.lang.String.valueOf(String.java:2826) [rt.jar:1.6.0_45]
    at java.lang.StringBuffer.append(StringBuffer.java:219) [rt.jar:1.6.0_45]
    at org.jboss.security.authentication.SubjectActions$ToStringSubjectAction.run(SubjectActions.java:77) [picketbox-infinispan-4.0.17.Final-redhat-1.jar:4.0.17.Final-redhat-1]
    at org.jboss.security.authentication.SubjectActions$ToStringSubjectAction.run(SubjectActions.java:53) [picketbox-infinispan-4.0.17.Final-redhat-1.jar:4.0.17.Final-redhat-1]
    at java.security.AccessController.doPrivileged(Native Method) [rt.jar:1.6.0_45]
    at org.jboss.security.authentication.SubjectActions.toString(SubjectActions.java:373) [picketbox-infinispan-4.0.17.Final-redhat-1.jar:4.0.17.Final-redhat-1]
    at org.jboss.security.authentication.JBossCachedAuthenticationManager.defaultLogin(JBossCachedAuthenticationManager.java:409) [picketbox-infinispan-4.0.17.Final-redhat-1.jar:4.0.17.Final-redhat-1]
    at org.jboss.security.authentication.JBossCachedAuthenticationManager.proceedWithJaasLogin(JBossCachedAuthenticationManager.java:345) [picketbox-infinispan-4.0.17.Final-redhat-1.jar:4.0.17.Final-redhat-1]
    at org.jboss.security.authentication.JBossCachedAuthenticationManager.authenticate(JBossCachedAuthenticationManager.java:333) [picketbox-infinispan-4.0.17.Final-redhat-1.jar:4.0.17.Final-redhat-1]
    at org.jboss.security.authentication.JBossCachedAuthenticationManager.isValid(JBossCachedAuthenticationManager.java:146) [picketbox-infinispan-4.0.17.Final-redhat-1.jar:4.0.17.Final-redhat-1]
    at org.jboss.as.web.security.JBossWebRealm.authenticate(JBossWebRealm.java:216) [jboss-as-web-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
    at org.apache.catalina.authenticator.BasicAuthenticator.authenticate(BasicAuthenticator.java:178) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:447) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
    at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
    at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50) [jboss-as-jpa-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
    at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169) [jboss-as-web-7.2.0.Final-redhat-8.jar:7.2.0.Final-redhat-8]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:145) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920) [jbossweb-7.2.0.Final-redhat-1.jar:7.2.0.Final-redhat-1]
    at java.lang.Thread.run(Thread.java:662) [rt.jar:1.6.0_45]