I have some issues regarding some PHP long running scripts. In logs it appears that the child exited with Code 18. I could not find anything about Code 18.
[26-Jul-2019 03:43:29] ALERT: oops, unknown child (19125) exited with code 18. Please open a bug report (https://bugs.php.net).
[26-Jul-2019 03:43:29] ALERT: oops, unknown child (18523) exited with code 18. Please open a bug report (https://bugs.php.net).
[26-Jul-2019 03:43:29] ALERT: oops, unknown child (19025) exited with code 18. Please open a bug report (https://bugs.php.net).