Deer sr-dev, I fall into a problem when I'm debuging kamailio with epoll io solution. "tcp main process" crashed because of using outbound memory, which tcpconn pointer pointed to. After analying, I suppose it's may because of epoll possible pitfalls of using an event cache. But I'm not pretty sure. Does kamailio code in io_wait.h/tcp_main.c have such way to avoid the epoll possible pitfalls of using an event cache? Looking forward your reply and thank you very much. Best Regards, Yaoping Zheng