Apcu and redis problem

General Installation & Upgrade
1

Hi,
I am using apcu in config.local.php

$config['cache_backend'] = 'apcu';

and redis for sessions

$config['session_backend'] = 'redis';

The problem is that i get this error for apcu

Tygh\Exceptions\ClassNotFoundException: "APCu" PHP extension is not installed. in /www/wwwroot/website/app/Tygh/Backend/Cache/Apcu.php:36
Stack trace:
#0 /www/wwwroot/website/app/Tygh/Registry.php(384): Tygh\Backend\Cache\Apcu->__construct()
#1 /www/wwwroot/website/app/Tygh/Registry.php(312): Tygh\Registry::cacheInit()
#2 /www/wwwroot/website/app/Tygh/Registry.php(797): Tygh\Registry::registerCache()
#3 /www/website/app/functions/fn.init.php(1155): Tygh\Registry::getOrSetCache()
#4 /www/website/app/functions/fn.init.php(1227): fn_init_unmanaged_addons()
#5 /www/website/init.php(195): fn_init()
#6 /www/website/admin.php(19): require('/www/wwwroot/ai...')
#7 {main}

Tygh\Exceptions\AException

Message
"APCu" PHP extension is not installed.

Error at
app/Tygh/Backend/Cache/Apcu.php, line: 36

Backtrace
File:app/Tygh/Registry.php
Line:384
Function:__construct

File:app/Tygh/Registry.php
Line:312
Function:cacheInit

File:app/Tygh/Registry.php
Line:797
Function:registerCache

File:app/functions/fn.init.php
Line:1155
Function:getOrSetCache

File:app/functions/fn.init.php
Line:1227
Function:fn_init_unmanaged_addons

File:init.php
Line:195
Function:fn_init

File:admin.php
Line:19
Function:require

And with redis for sessions i cant login on admin or front area.

2

I changed back to file and database and everything is ok.
Apcu and Redis are installed on the server.
The error for apcu i get when i try execute a cron job

3

In admin panel

Settings, logs, click on the gear icon on the top right
PHP information

Check that APCu and redis extensions are actually enabled

image
image1083×306 9.22 KB

image
image1058×196 5.69 KB

4

Redis in enabled

Screenshot_1
Screenshot_1994×154 17 KB

5

As always, have a current backup, especially if you don’t know what you are doing.

Then redis should work. Must manually clear var/cache after you change the config file.

6

Hi!

The error from the provided backtrace clearly states that the APCu PHP extension is not installed at your server. Please contact your hosting support/server administrator on this case, or switch the cache_backend back to file.

7

Is working now, i dont know what was the problem with redis, maybe some cache issues.
I installed APCu and everything is ok.

1 Like
8

Redis wasn’t involved, just the APCu :slight_smile:

9

True, for Redis i just needed to clear cache.
Thank you again for your help!

1 Like