Files driver edge-case "failed to open stream: No such file or directory" when writing

[zanderwar]

Configuration

• PhpFastCache version: 3.0.0
• PhpFastCache API version: 8.0.4
• PHP version: 7.3.27
• Operating system: Debian GNU/Linux 10 (buster)

Describe the bug

fopen(/full/path/to/files/cache/storage/Files/55/86/55860346fb35b4cb9f90bacc1b97affc.txt): failed to open stream: No such file or directory 

To Reproduce Not sure. Used by a few thousand sites, collectively this error has only occurred 4 times, there are no folder permission errors, and it has no issue writing as there is already an ungodly amount of cache files being used successfully.

1 File "/vendor/phpfastcache/phpfastcache/lib/Phpfastcache/Core/Pool/IO/IOHelperTrait.php" line 355
2 File "/vendor/phpfastcache/phpfastcache/lib/Phpfastcache/Core/Pool/IO/IOHelperTrait.php" line 355 in fopen [args]
3 File "/vendor/phpfastcache/phpfastcache/lib/Phpfastcache/Drivers/Files/Driver.php" line 106 in Phpfastcache\Drivers\Files\Driver::writefile [args]
4 File "/vendor/phpfastcache/phpfastcache/lib/Phpfastcache/Core/Pool/CacheItemPoolTrait.php" line 442 in Phpfastcache\Drivers\Files\Driver::driverWrite [args]

If you need anymore information, please let me know

Thank you for providing and maintaining this package :)

[github-actions[bot]]

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[Geolim4]

Hello,

This "error" has been reported multiple time and I can't fix it at all because it's not reproducible at all and it is more related to a race condition server-side.

Currently pfc is heavily tested with multiple concurrent requests and this bug does not appears at all (see our Travis builds).

I'm recommending you to migrate to a more reliable backend such Redis and similar.

Files driver should be reserved on small sites with low traffic or environment developments.