Bug #65559 [Com]: Opcache: cache not cleared if changes occur while running

Edit report at https://bugs.php.net/bug.php?id=65559&edit=1 ID: 65559 Comment by: roger dot qiu at polycademy dot com Reported by: zoeslam at gmail dot com Summary: Opcache: cache not cleared if changes occur while running Status: Closed Type: Bug Package: opcache Operating System: Ubuntu PHP Version: 5.5.3 Assigned To: dmitry Block user comment: N Private report: N New Comment: This is still a problem, because include is sometimes used for non-source code files that can be changed under 1 second during runtime. https://github.com/tedivm/Stash/pull/135#issuecomment-38640785 Previous Comments: ------------------------------------------------------------------------ [2013-11-26 10:00:36] ab@php.net Automatic comment on behalf of dmitry@zend.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=a8c7e50f4d7d73797615734978259d640b3835c1 Log: Fixed bug #65559 (Opcache: cache not cleared if changes occur while running) ------------------------------------------------------------------------ [2013-11-26 07:37:19] dmitry@php.net Automatic comment on behalf of dmitry@zend.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=a8c7e50f4d7d73797615734978259d640b3835c1 Log: Fixed bug #65559 (Opcache: cache not cleared if changes occur while running) ------------------------------------------------------------------------ [2013-11-25 10:54:43] zoeslam at gmail dot com Hi dmitry, almost all http requests last less than 1 second, and it's common to write this cache algorithm: $var = include $cachefile; if (must_renew($var)) { file_put_contents($cachefile, renew($var)); $var = include $cachefile; } use($var); So I think APC did a workaround just because of that common usage. Your workaround works, but it' pretty bad to couple a general algorithm to teh cache subsystem. ------------------------------------------------------------------------ [2013-11-25 10:41:51] dmitry@php.net APC made a hack to prevent caching of just updated files. This makes the test passed. With opcache.revalidate_freq=0 OPCache checks file modification time on each include(), but the test script most probably makes two writes in a single second. So file modification times are the same. If you insert sleep(1) between inclue()s, it works as expected. To workaround the problem you may add the file into blacklist or use opcache_invalidate(): if (function_exists("opcache_invalidate")) opcache_invalidate($file, true); We may also hack OPCache similar to APC, but I'm not sure it's the right way. ------------------------------------------------------------------------ [2013-11-21 22:01:45] nanobreaker at mail dot bg I have the same problem. If I change a file nothing happens. For development purposes I tried to disable OPCache, but that doesn't work as well. Only way I can fix this problem is by rebooting the system. Details: Ubuntu Server 13.10 x64 PHP 5.5.3 Apache 2.4.6 ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=65559 -- Edit this bug report at https://bugs.php.net/bug.php?id=65559&edit=1