Bug #80864 [Com]: opcache.file-cache - problems on shared hosting

Edit report at https://bugs.php.net/bug.php?id=80864&edit=1 ID: 80864 Comment by: t dot fronk at gmx dot net Reported by: t dot fronk92 at gmx dot de Summary: opcache.file-cache - problems on shared hosting Status: Open Type: Bug Package: opcache Operating System: Debian 10 PHP Version: 7.4.16 Block user comment: N Private report: N New Comment: I have these Problems with all 7.4 Versions, since release. When opcache.file-cache and opcache.file-cache-only are active -> i only get problems. Removing the file-cache folder is only a very small fix. On next service restart (systemctl restart php7.4-fpm) i get the same Problems - with "reload" it needs a little bit more time to crash. But the result is the same: opcache.file-cache with opcache.file-cache-only looks very buggy in 7.4. I want to use this function on a shared hosting server with multiple websites. So i read the PHP Docs and i understand that opcache.file-cache and opcache.file-cache-only can solve these security problems because there is no shared opcache and every website has his own opcache-folder. But it dont work as expected. Now i use OPcache without file-cache and these settings: php.ini: opcache.enable = 1 opcache.memory_consumption = 5120 opcache.interned_strings_buffer = 64 opcache.max_accelerated_files = 1000000 opcache.validate_timestamps = 1 opcache.revalidate_freq = 0 opcache.validate_permission = 1 opcache.validate_root = 1 ...rest Default FPM-POOL: php_admin_value[opcache.enable] = 1 php_admin_value[opcache.restrict_api] = /home/website123/wpdocs/ php_admin_value[disable_functions] = opcache_get_configuration,opcache_get_status,... This solutions works now without problems - or better said: until now :) Previous Comments: ------------------------------------------------------------------------ [2021-03-17 10:15:03] php at i8i dot fr I'm pretty sure. I got the problem on 3 vhosts on 2 different servers. It worked with the same fix. Here was the errors (even with 2G of memory limit) : [16-Mar-2021 15:21:04 Europe/Paris] PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 40747520404 bytes) in /var/www/***/www/vendor/twig/twig/src/Extension/EscaperExtension.php on line 204 [16-Mar-2021 20:27:37 Europe/Paris] PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 36081806504 bytes) in /var/www/***/www/vendor/twig/twig/src/Extension/EscaperExtension.php on line 204 Mar 16 15:21:15 vm-dev kernel: [1157155.218584] php-fpm7.4[23089]: segfault at 8 ip 000056182eb6040d sp 00007ffc8d1f0100 error 4 in php-fpm7.4[56182e94c000+26d000] Mar 16 20:27:46 vm-dev kernel: [1175545.476694] php-fpm7.4[6717]: segfault at 7fe7b5462dc8 ip 0000558c3ef4d3c4 sp 00007ffcf683c8a0 error 4 in php-fpm7.4[558c3ed39000+26d000] ------------------------------------------------------------------------ [2021-03-17 09:35:31] nikic@php.net @php at i8i dot fr: That's odd. There has only been a very small number of changes to opcache between PHP 7.4.15 and PHP 7.4.16: https://github.com/php/php-src/compare/PHP-7.4.15...PHP-7.4.16#diff-b66a794224587a12f8650298f931f4feafb7734f00885ad885f609a68e840949 Both of these changes don't affect file cache. ------------------------------------------------------------------------ [2021-03-17 09:29:40] php at i8i dot fr Hi, I get this problem too when PHP switch from 7.4.15 to 7.4.16. I had to purge all Opcache file cache. So in your case, try to remove all this folders : /home/website1/opcache/* Best regards, Arnaud ------------------------------------------------------------------------ [2021-03-14 16:41:34] t dot fronk92 at gmx dot de Description: ------------ Hi, i have a server with multiple WordPress Websites. Every Website has his own User and PHP-FPM Pool. I tried to activate OPcache securely - because of the Shared Cache Problem - with this settings in every Pool: php_admin_value[opcache.enable] = 1 php_admin_value[opcache.enable_cli] = 0 php_admin_value[opcache.memory_consumption] = 256 php_admin_value[opcache.max_accelerated_files] = 32531 php_admin_value[opcache.validate_timestamps] = 1 php_admin_value[opcache.revalidate_freq] = 0 ;php_admin_value[opcache.fast_shutdown] = 0 php_admin_value[opcache.file_cache] = /home/website1/opcache php_admin_value[opcache.file_cache_only] = 1 php_admin_value[opcache.validate_permission] = 1 Every Pool has his own settings for file-cache. I understand these settings that there is no shared memory... only the file-cache with 256 MB for every website. But it didnt work as expected. NGINX has many SEGFAULTS with PHP7.4 in error.log. When i deactivate OPcache all is working fine. With PHP7.3 i never get these SEGFAULTS. Maybe there is a Bug in PHP or Configs are wrong - i really dont know. I hope you can help me or show me a working solution. THX Test script: --------------- I dont have. ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80864&edit=1