wangduanduan left a comment (kamailio/kamailio#4198)
[ if(rank != PROC_TIMER && rank <= PROC_MAIN)](https://github.com/kamailio/kamailio/blob/7314fbcc6fb7c211817d1660b98deaf9db...)
so kafka_send() can not use in event_route[tcp:closed], event_route[tcp:reset], event_route[tcp:timeout]