RedisStorage: Unsupported operand types

[wodCZ]

On this line I sometimes get Fatal Error Unsupported operand types.

In debugger I see following values:

$key = 'Kdyby.Autowired.AutowireProperties 6c0ef3504d5a554fb419842d8047550c';

$data = 'a:7:{s:9:"webLoader";a:2:{s:5:"value";N;s:4:"type";s:29:"WebLoader\Nette\LoaderFactory";}s:14:"systemSettings";a:2:{s:5:"value";N;s:4:"type";s:28:"Libs\Settings\SystemSettings";}s:15:"companySettings";a:2:{s:5:"value";N;s:4:"type";s:29:"Libs\Settings\CompanySettings";}s:11:"webSettings";a:2:{s:5:"value";N;s:4:"type";s:25:"Libs\Settings\WebSettings";}s:12:"imageManager";a:2:{s:5:"value";N;s:4:"type";s:30:"Libs\System\Image\ImageManager";}s:12:"modalManager";a:2:{s:5:"value";N;s:4:"type";s:24:"Libs\Modals\ModalManager";}s:11:"menuFactory";a:2:{s:5:"value";N;s:4:"type";s:26:"DK\Menu\UI\IControlFactory";}}";';

$meta = 's:1102:"{"time":"0.67322700 1450782047","callbacks":[[["Nette\\Caching\\Cache","checkFile"],"\/home\/vagrant\/Code\/xxxxxxxxxxxxxxxx\/App\/Presenters\/BasePresenter.php",1450445442],[["Nette\\Caching\\Cache","checkFile"],"\/home\/vagrant\/Code\/xxxxxxxxxxxxxxxx\/App\/RealEstateModule\/Presenters\/ListPresenter.php",1448030539],[["Nette\\Caching\\Cache","checkFile"],"\/home\/vagrant\/Code\/xxxxxxxxxxxxxxxx\/temp\/cache\/Nette.Configurator\/Container_e92ce85e6e.php",1450781946]],"serialized":true}';

$storedValue = 's:1102:"{"time":"0.67322700 1450782047","callbacks":[[["Nette\\Caching\\Cache","checkFile"],"\/home\/vagrant\/Code\/xxxxxxxxxxxxxxxx\/App\/Presenters\/BasePresenter.php",1450445442],[["Nette\\Caching\\Cache","checkFile"],"\/home\/vagrant\/Code\/xxxxxxxxxxxxxxxx\/App\/RealEstateModule\/Presenters\/ListPresenter.php",1448030539],[["Nette\\Caching\\Cache","checkFile"],"\/home\/vagrant\/Code\/xxxxxxxxxxxxxxxx\/temp\/cache\/Nette.Configurator\/Container_e92ce85e6e.php",1450781946]],"serialized":true} a:7:{s:9:"webLoader";a:2:{s:5:"value";N;s:4:"type";s:29:"WebLoader\Nette\LoaderFactory";}s:14:"systemSettings";a:2:{s:5:"value";N;s:4:"type";s:28:"Libs\Settings\SystemSettings";}s:15:"companySettings";a:2:{s:5:"value";N;s:4:"type";s:29:"Libs\Settings\CompanySettings";}s:11:"webSettings";a:2:{s:5:"value";N;s:4:"type";s:25:"Libs\Settings\WebSettings";}s:12:"imageManager";a:2:{s:5:"value";N;s:4:"type";s:30:"Libs\System\Image\ImageManager";}s:12:"modalManager";a:2:{s:5:"value";N;s:4:"type";s:24:"Libs\Modals\ModalManager";}s:11:"menuFactory";a:2:{s:5:"value";N;s:4:"type";s:26:"DK\Menu\UI\IControlFactory";}}";'

Problem is with that $meta being serialized json string, which json_decode($meta, true) evaluates as null.

This happens about once or twice per week, clearing cache helps. I didn't find a way to reproduce this. As there is no production version yet, I can't tell whether it may be caused by another error or something.

[fprochazka]

The meta looks like serialized json string. Weird. Never happened to me :-/

[DanielStejskal]

Hi, it happened today (2016-10-27 08-18-05) on my production. Looks like long recursive problem.

Error: Unsupported operand types in /app/vendor/kdyby/redis/src/Kdyby/Redis/RedisStorage.php:368 
caused by Error: Unsupported operand types in /app/vendor/kdyby/redis/src/Kdyby/Redis/RedisStorage.php:368 caused by Error: Unsupported operand types in /app/vendor/kdyby/redis/src/Kdyby/Redis/RedisStorage.php:368 caused by... and so on

[jancko]

Hey , i'm encountering this error a lot in last version . Totally randomly cache value works for some time and after that the whole string become serialized string after that json_decode is working with something like this as $meta value s:557:\"{\"time\":\"0.61602400 1575376562\"} which cannot be decoded

[Spamercz]

Do you have high throughput application? What version of redis are you using? This is quite difficult issue to replicate, but it would be great help if someone could make failing test reproducing this behaviour.
It did occure for me sometimes but I'm not able to reproduce this in tests.