my web app is running as a simple war file under tomcat, configured for https Authentication is being handled via servlet. I am getting (sometimes, unpredicatbly) error which is preventing user login. jboss-web.xml declares: < security-domain flushOnSessionInvalidation="false" > Somewhere I read to remove the 'flush.. ' attribute?? Any tips appreciated. partial stack trace: 2006-11-29 13:13:50,816 DEBUG [org.jboss.web.tomcat.security.SecurityFlushSessionListener] Obtaining SecurityManagerService failed:: java.lang.ClassCastException: org.jnp.interfaces.NamingContext at org.jboss.web.tomcat.security.SecurityFlushSessionListener.getSecurityManagerService(SecurityFlushSessionListener.java:193) at org.jboss.web.tomcat.security.SecurityFlushSessionListener.getSubjectAndSecurityDomain(SecurityFlushSessionListener.java:160) at org.jboss.web.tomcat.security.SecurityFlushSessionListener.sessionDestroyed(SecurityFlushSessionListener.java:79) at org.apache.catalina.session.StandardSession.expire(StandardSession.java:687) at org.apache.catalina.session.StandardSession.isValid(StandardSession.java:579) at org.apache.catalina.session.ManagerBase.processExpires(ManagerBase.java:678) at org.apache.catalina.session.ManagerBase.backgroundProcess(ManagerBase.java:663) at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1284) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1569) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1578) at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1558) at java.lang.Thread.run(Thread.java:595) 2006-11-29 13:13:50,822 DEBUG [org.jboss.web.tomcat.security.SecurityFlushSessionListener] Unable to obtain SecurityDomain 2006-11-29 14:03:54,485 DEBUG [org.jboss.web.tomcat.security.SecurityFlushSessionListener] Obtaining SecurityManagerService failed:: java.lang.ClassCastException: org.jnp.interfaces.NamingContext View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3990286#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...