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Task #88927

closed

The temporary cache file ... could not be written

Added by Christoph Lehmann over 5 years ago. Updated over 1 year ago.

Status:
Closed
Priority:
Should have
Assignee:
-
Category:
Caching
Target version:
-
Start date:
2019-08-06
Due date:
% Done:

0%

Estimated time:
TYPO3 Version:
9
PHP Version:
Tags:
Complexity:
Sprint Focus:

Description

TYPO3\CMS\Core\Cache\Exception: The temporary cache file "/var/www/.../typo3temp/var/Cache/Code/cache_core/5d499dd925221994946712.temp" could not be written.
  File "typo3_src-8.7.27/typo3/sysext/core/Classes/Cache/Backend/SimpleFileBackend.php", line 233, in set
    throw new \TYPO3\CMS\Core\Cache\Exception('The temporary cache file "' . $temporaryCacheEntryPathAndFilename . '" could not be written.', 1334756737);
  File "typo3_src-8.7.27/typo3/sysext/core/Classes/Cache/Frontend/PhpFrontend.php", line 64, in set
    $this->backend->set($entryIdentifier, $sourceCode, $tags, $lifetime);
  File "typo3_src-8.7.27/typo3/sysext/core/Classes/Utility/ExtensionManagementUtility.php", line 1822, in createBaseTcaCacheFile
    . ';'
  File "typo3_src-8.7.27/typo3/sysext/core/Classes/Utility/ExtensionManagementUtility.php", line 1710, in loadBaseTca
    static::createBaseTcaCacheFile();
  File "typo3_src-8.7.27/typo3/sysext/core/Classes/Core/Bootstrap.php", line 966, in loadBaseTca
    ExtensionManagementUtility::loadBaseTca($allowCaching);
...
(6 additional frame(s) were not displayed)

It may be a race condition due to parallel requests and should be handle more friendly: "Okay, a temporary error, but go on"


Related issues 2 (1 open1 closed)

Related to TYPO3 Core - Story #81432: Replace TYPO3 caching solution with PSR-6 / Doctrine capable alternativeClosed2017-06-02

Actions
Related to TYPO3 Core - Bug #91768: Race condition while caching data using SimpleFileBackendUnder Review2020-07-08

Actions
Actions #1

Updated by Christoph Lehmann about 5 years ago

  • Related to Story #81432: Replace TYPO3 caching solution with PSR-6 / Doctrine capable alternative added
Actions #2

Updated by Susanne Moog over 4 years ago

  • Status changed from New to Needs Feedback

When does this happen / is there a way to reproduce it?

In addition: it might be a temporary error or a deeper problem, we have currently no way to differentiate the two.

Actions #3

Updated by Martin Schulz over 4 years ago

When does this happen / is there a way to reproduce it?

  1. Start a long runing script that uses a SimpleFileBackend cache
  2. Clear the file cache by flushing the /cache dir

In my case the long runing scipt is an importer script using some parts of extbase. So the cache in that case would be the extbase reflection cache.

So when is the cache flushed as described above?

I found the follwing 2, but there might be more:

The problem is, that the cache file/directory to use is only initializes once. So if the file/dir is deleted (by an other script) during a long runing script, writing the cache will crash.

Actions #4

Updated by Alexander Vogt over 4 years ago

The error occurs after the "flushDirectory" call:
https://github.com/TYPO3/TYPO3.CMS/blob/9.5/typo3/sysext/install/Classes/Service/ClearCacheService.php#L44

After that the specific cache directory (e.g. var/cache/data/extbase_reflection) will be deleted and this leads to the exception:
https://github.com/TYPO3/TYPO3.CMS/blob/9.5/typo3/sysext/core/Classes/Cache/Backend/SimpleFileBackend.php#L231

The directory will only be recreated on cache initialization:
https://github.com/TYPO3/TYPO3.CMS/blob/9.5/typo3/sysext/core/Classes/Cache/Backend/SimpleFileBackend.php#L91

Actions #5

Updated by Christoph Lehmann over 4 years ago

For me it happens for requests while switching a symlinked document root.

Actions #6

Updated by Mathias Brodala about 4 years ago

  • Related to Bug #91768: Race condition while caching data using SimpleFileBackend added
Actions #7

Updated by Sybille Peters over 1 year ago

This has been on "Needs Feedback" for 3 years. Christoph, can you provide more information on your setup and when this happens?

Actions #8

Updated by Christoph Lehmann over 1 year ago

  • Status changed from Needs Feedback to Closed

I don't maintain the system anymore and i don't had this problem in any other system since then.

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