"Undefined index: key in /home/abc/xyz/public_html/classes/cache/CacheApc.php" filling 20GB of logs

[mmmn]

I have installed prestashop a week ago with no customer traffic as of today.

 

But I see that the logs are growing at an extremely high rate for a website without traffic. Checking Apache error logs, I see this error repeated over an over:

Stack trace:
[*date*] [error] [client *] PHP   1. {main}() /home/abc/xyz/public_html/administrator/index.php:0
[*date*] [error] [client *] PHP   2. require() /home/abc/xyz/public_html/administrator/index.php:34
[*date*] [error] [client *] PHP   3. ShopCore::initialize() /home/abc/xyz/public_html/config/config.inc.php:100
[*date*] [error] [client *] PHP   4. DbCore->executeS() /home/abc/xyz/public_html/classes/shop/Shop.php:330
[*date*] [error] [client *] PHP   5. CacheCore::getInstance() /home/abc/xyz/public_html/classes/db/Db.php:510
[*date*] [error] [client *] PHP   6. CacheApcCore->__construct() /home/abc/xyz/public_html/classes/cache/Cache.php:131
Notice:  Undefined index: key in /home/abc/xyz/public_html/classes/cache/CacheApc.php on line 40

Does anybody know what might be causing this and a potential fix?

 

Thanks

Edited August 21, 2015 by mmmn (see edit history)

[NishantVadgama]

Goto Back Office Advance Parameters->Performance and Clear Cache form right top. and if possible then disable the cache.your problem will be solved.

[mmmn]

Did that but still see the same stacktrace (didn't disable cache)! What is the cause of the error at all?

[BZZYBI]

I have the same issue and deleted all my old cache files but i still get this problem.

Anybody know how to solve this.. Thanks Guys 

[M03G]

Did that but still see the same stacktrace (didn't disable cache)! What is the cause of the error at all?

 

 

I have the same issue and deleted all my old cache files but i still get this problem.

Anybody know how to solve this.. Thanks Guys 

The problem is the old version of Prestashop and the new version of APC. The new version of APC is no key "key", it is replaced with a key "info". This problem is discussed in the repository APCu - https://github.com/krakjoe/apcu/issues/98.

The new version of Prestashop is already fixed - https://github.com/PrestaShop/PrestaShop/commit/7047e88436618dc65565290b07af4cd6d21ec35f

You can do the same - to replace the line in the 42 classes / cache / CacheApc.php