我使用JBoss 5.1.0 GA和Terracotta EHcache（使用Hibernate）。这个设置工作正常，但当我尝试添加Terracotta WebSessions时，我得到了
09:28:11,894 ERROR [CoyoteAdapter] An exception or error occurred in the container during the request processing
java.lang.IllegalArgumentException: callerSubject is null
at org.jboss.security.plugins.javaee.WebAuthorizationHelper.hasRole(WebAuthorizationHelper.java:125)
at org.jboss.web.tomcat.security.SecurityAssociationActions$10.run(SecurityAssociationActions.java:363)
at org.jboss.web.tomcat.security.SecurityAssociationActions$10.run(SecurityAssociationActions.java:360)
at java.security.AccessController.doPrivileged(Native Method)
at org.jboss.web.tomcat.security.SecurityAssociationActions.hasRole(SecurityAssociationActions.java:359)
at org.jboss.web.tomcat.security.JBossWebRealm.hasRole(JBossWebRealm.java:598)
at org.apache.catalina.realm.RealmBase.hasResourcePermission(RealmBase.java:789)
at org.jboss.web.tomcat.security.JBossWebRealm.hasResourcePermission(JBossWebRealm.java:475)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:507)
at org.terracotta.modules.tomcat.tomcat_5_5.SessionValve55.tcInvoke(SessionValve55.java:99)
at org.terracotta.modules.tomcat.tomcat_5_5.SessionValve55.invoke(SessionValve55.java:85)
at org.terracotta.session.ModernTomcatSessionValve.invoke(ModernTomcatSessionValve.java:66)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:662)
我已按照TC网站http://www.terracotta.org/documentation/product-documentation-1page上的文档进行操作。
我也在他们的论坛上发布了专门的WebSession部分，但没有人回答:(。
如果有人设法配置类似我的设置，请回复。
谢谢。