Hello, I'm having the following problem: I'm using a servlet to connect to a remote EJB, The servlet can choose the server where the EJB is located, so I create an InitialContext setting its environment. Then SessionEjb method is called and it performs some operation on DB. And this works! Problems arise because I've implemented a sort of failover: if the method of SessionBean fails on server A its catch clause il tries to do the same operation on server B, but on server B instantiating a new InitialContext and getting the interface from it. I can access the method on server B from A but when I try to open the db connection I get and Invalid principal exception. The strange thing is that if I access the same method fom the servlet I've no Exceptions. The servlet is located for both cases on server C. Could someone tell me why I have this problem ? Thanks in advance, kiuma View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3968356#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...