Bug #61670


cleared cache_classes causes fatal error

Added by Philipp Wrann almost 10 years ago. Updated about 9 years ago.

Should have
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When configuring the cache_classes to apc backend it may happen (apache reload for example) that the cache gets flushed, thus the cached code will not work anymore, fatals are thrown from bootstrap.

A on-the-fly class cache is not possible, i am aware of that (performance)
An additional check in the autoload function would also be a performance loss

But it might be a solution to ensure those caches are stored in the same backend.
So if you make the cache_classes cache implement the PhpCapeable Interface it would effectively make those caches to be stored in typo3temp/Cache/Code

That would make the bootstrap more robust.

Additionally you should ensure all Classes used in the bootstrap are accessible via convention, so event if the cache_classes is gone the bootstrap does not throw a fatal error. If i remove all t3lib_div from my localconf files (some older extension) there is still a fatal because of some logger from the core, that is not accessible via TYPO3 Naming Convention.

Fatal error: Interface 'Psr\Log\LoggerInterface' not found in .../typo3_src/typo3/sysext/core/Classes/Log/Logger.php on line 24

Alternatively you could also check the cache_classes cache very early in the bootstrap, if its empty recreate it...


apc.png (41.7 KB) apc.png APC stats after one day of operating Philipp Wrann, 2014-10-16 09:39

Related issues 1 (0 open1 closed)

Is duplicate of TYPO3 Core - Bug #60760: Race condition during system cache flushClosedAlexander Opitz2014-08-04

Actions #1

Updated by Philipp Wrann almost 10 years ago

Why a single cache entry for each class, wouldnt it be simpler to cache the complete cache_classes as associative array and load that array in the autoloader on bootstrap?

If the cache is empty create it... That would be robust and maybe also faster, wouldnt it?

Actions #2

Updated by Philipp Wrann over 9 years ago

Please have a look:

Either my configuration is wrong, i dont get something or the caching behaviour of some caches does not qualify for APC Backend.

My apc config:
Runtime Settings
apc.cache_by_default 1
apc.canonicalize 1
apc.coredump_unmap 0
apc.enable_cli 1
apc.enabled 1
apc.file_md5 0
apc.file_update_protection 0
apc.gc_ttl 0
apc.include_once_override 0
apc.lazy_classes 0
apc.lazy_functions 0
apc.max_file_size 7M
apc.mmap_file_mask /tmp/apc.tEOnNw
apc.num_files_hint 0
apc.report_autofilter 0
apc.rfc1867 1
apc.rfc1867_freq 0
apc.rfc1867_name APC_UPLOAD_PROGRESS
apc.rfc1867_prefix upload_
apc.rfc1867_ttl 0
apc.serializer default
apc.shm_segments 1
apc.shm_size 2048M
apc.slam_defense 1
apc.stat 0
apc.stat_ctime 0
apc.ttl 0
apc.use_request_time 1
apc.user_entries_hint 0
apc.user_ttl 0
apc.write_lock 1

My Cacheconfig is as follows (located in AdditionalConfiguration.php):

$pagecache = $systemcache = array(
'backend' => 'TYPO3\\CMS\\Core\\Cache\\Backend\\ApcBackend',
'frontend' => 'TYPO3\\CMS\\Core\\Cache\\Frontend\\VariableFrontend',
'options' => array('defaultLifetime' => 0)

$pagecache['options']['defaultLifetime'] = 21600;
$pagecache['groups'] = array('pages','all');
$systemcache['groups'] = array('system');
$systemcache['options']['defaultLifetime'] = 0;

$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cache_pages'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cache_pagesection'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cache_hash'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cache_rootline'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['fluidchunks'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['pidlist'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['subtypes'] = $pagecache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['news_categorycache'] = $pagecache;

$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['extbase_object'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['extbase_reflection'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['extbase_datamapfactory_datamap'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['extbase_typo3dbbackend_tablecolumns'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['generatedflex'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['l10n'] = $systemcache;
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['extbase_typo3dbbackend_queries'] = $systemcache;

$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['cache_core']['backend'] = 'TYPO3\\CMS\\Core\\Cache\\Backend\\FileBackend';
$GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['class_cache']['backend'] = 'TYPO3\\CMS\\Core\\Cache\\Backend\\FileBackend';

TSConfig for users:
options.clearCache.pages = 1
options.clearCache.all = 1

Actions #3

Updated by Christian Kuhn about 9 years ago

  • Status changed from New to Rejected

Putting all caches into APC backend is a bad idea for various reasons. Especially for big caches like pages, and those that use tagging. The "logger not found issue" part of this report is a duplicate of #60760 - I'll now close this one here as duplicate of the other one.


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