JAVA: RMI Callback -> object already exported
问题 this is my first question, so sorry if i'll make it incorrect and for my english. I have to do a distributed-hangman project in java, there are guests, players and masters (more matches). When a user(already registered) log himself or when a master open a match, the server must notifies to all guests (only guests) the event. In the client i had to create 2 stub, 1 for the server, the other one for the graphic interface (swing). The threadpool is for manage the matches, not used now. This is