Example output using backlog of 1:
Jul 24 17:29:52 kernel: sonewconn: pcb 0xfffff800254b4d40: Listen queue overflow: 2 already in queue awaiting acceptance (3 occurrences)
Jul 24 17:29:52 kernel: TCP: [10.7.223.246]:55613 to [10.7.223.201]:3333; syncache_socket: Socket create failed due to limits or memory shortage