[root@sgsv5 nginx]# tail -100 /var/log/nginx/error.log
2020/02/22 07:23:56 [alert] 11993#0: worker process 21319 exited on signal 9

[ W 2020-02-22 07:23:59.8960 21276/T1 age/Cor/CoreMain.cpp:1236 ]: Watchdog seems to be killed; forcing shutdown of all subprocesses
[ N 2020-02-22 07:23:59.8940 21276/T8 age/Cor/CoreMain.cpp:671 ]: Signal received. Gracefully shutting down... (send signal 2 more time(s) to force shutdown)

[ N 2020-02-22 07:23:59.8962 21276/T8 age/Cor/CoreMain.cpp:671 ]: Signal received. Gracefully shutting down... (send signal 1 more time(s) to force shutdown)