LDAP - Failed to parse: null, disabling recursion: java.lang.NumberFormatException: null

Configurando um Ambiente JBoss 7.1.1-Final com JAAS e LDAP/AD eu tive o erro abaixo:

14:46:42,273 TRACE [org.jboss.security.auth.spi.LdapExtLoginModule] (http-localhost-127.0.0.1-8080-1) Failed to parse: null, disabling recursion: java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:454) [rt.jar:1.7.0_51]
at java.lang.Integer.parseInt(Integer.java:527) [rt.jar:1.7.0_51]
at org.jboss.security.auth.spi.LdapExtLoginModule.createLdapInitContext(LdapExtLoginModule.java:395) [picketbox-4.0.7.Final.jar:4.0.7.Final]
[...]
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930) [jbossweb-7.0.13.Final.jar:]
at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_51]

Para resolver, bastou adicionar a linha abaixo no login-module do subsystem security no standalone.xml

<module-option name="roleRecursion" value="-1"/>

Isso resolveu o problema!!!

Abraços!!
Adriano Schmidt