Found the cause.. # strace -p 392
strace: Process 392 attached getrandom(0x7ffcc15b8a40, 16, 0) = ? ERESTARTSYS (To be restarted if SA_RESTART is set) --- SIGTERM {si_signo=SIGTERM, si_code=SI_USER, si_pid=1, si_uid=0} --- +++ killed by SIGTERM +++ -- Olaf