Intermittent white screens caused by PHP-FPM being turned on?
Posted: Sat May 07, 2022 1:50 am
I am just asking this to see if anyone knows what might be the cause of this. A site I work on recently started going up and down with completely blank white screens on all pages. Wait a few seconds, reload, and it would then come up fine. My uptime monitor said this was happening all day long. Turning on error reporting, etc. showed nothing. The page was still blank even with reporting on.
The problem was not due to an htaccess issue (I swapped it out with the default version). On a whim I went into WHM and turned off the PHP-FPM switch for that one account. Suddenly the problem stopped. The site now loads normally every single time.
Any ideas what could cause such a thing? It isn't a huge problem to have FPM off on that account but I am wondering what might be the root cause? Other accounts on that same server do not have this problem even though they are essentially copies of each other.
The problem was not due to an htaccess issue (I swapped it out with the default version). On a whim I went into WHM and turned off the PHP-FPM switch for that one account. Suddenly the problem stopped. The site now loads normally every single time.
Any ideas what could cause such a thing? It isn't a huge problem to have FPM off on that account but I am wondering what might be the root cause? Other accounts on that same server do not have this problem even though they are essentially copies of each other.