Module 'apcu' already loaded at Unknown#0

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Nextcloud version 19.0.2:
Operating system and version Ubuntu 18.04:
Apache or nginx version Apache 2.4.25:
PHP version 7.4:
The event log in settings / admin / logging is frequently filled with this error.
I have already read about this error articles but I cannot find a possible solution.
Could you give me some help?

root@cloud:~# php -i | grep apc
/etc/php/7.4/cli/conf.d/20-apcu.ini,
/etc/php/7.4/cli/conf.d/25-apcu_bc.ini
apc
apcu
apc.coredump_unmap => Off => Off
apc.enable_cli => Off => Off
apc.enabled => On => On
apc.entries_hint => 4096 => 4096
apc.gc_ttl => 3600 => 3600
apc.mmap_file_mask => no value => no value
apc.preload_path => no value => no value
apc.serializer => php => php
apc.shm_segments => 1 => 1
apc.shm_size => 32M => 32M
apc.slam_defense => Off => Off
apc.smart => 0 => 0
apc.ttl => 0 => 0
apc.use_request_time => On => On

The output of your Nextcloud log in Admin > Logging:

    [PHP] Error: Module 'apcu' already loaded at Unknown#0

    GET /ocm-provider/
    from xxx.xxx.xxx.xxx by myuser at 2020-09-03T15:41:51-04:00

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

    "system": {
                "instanceid": "***REMOVED SENSITIVE VALUE***",
                "passwordsalt": "***REMOVED SENSITIVE VALUE***",
                "secret": "***REMOVED SENSITIVE VALUE***",
                "trusted_domains": [
                    "url.dominio.net",
                    "1.1.1.1"
                ],
                "datadirectory": "***REMOVED SENSITIVE VALUE***",
                "dbtype": "mysql",
                "version": "19.0.2.2",
                "overwrite.cli.url": "https:\/\/url.dominio.net",
                "htaccess.RewriteBase": "\/",
                "dbname": "***REMOVED SENSITIVE VALUE***",
                "dbhost": "***REMOVED SENSITIVE VALUE***",
                "dbport": "",
                "dbtableprefix": "oc_",
                "mysql.utf8mb4": true,
                "dbuser": "***REMOVED SENSITIVE VALUE***",
                "dbpassword": "***REMOVED SENSITIVE VALUE***",
                "installed": true,
                "skeletondirectory": "",
                "mail_from_address": "***REMOVED SENSITIVE VALUE***",
                "mail_smtpmode": "smtp",
                "mail_sendmailmode": "smtp",
                "mail_domain": "***REMOVED SENSITIVE VALUE***",
                "mail_smtpauth": 1,
                "mail_smtpauthtype": "LOGIN",
                "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
                "mail_smtpport": "25",
                "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
                "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
                "default_language": "es",
                "ldapIgnoreNamingRules": false,
                "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory",
                "memcache.local": "\\OC\\Memcache\\APCu",
                "memcache.distributed": "\\OC\\Memcache\\Redis",
                "memcache.locking": "\\OC\\Memcache\\Redis",
                "redis": {
                    "host": "***REMOVED SENSITIVE VALUE***",
                    "port": 6379
    },
2

Try commenting apcu out

sudo sed -i 's/ext/;ext/' /etc/php/7.4/apache/conf.d/20-apcu

sudo systemctl reload apache2

3

Hello @Vincent_Stans , thanks for the contribution, then doing that procedure I get this error which tells me that this is not the solution. Any other ideas regarding this error.

[PHP] Error: PHP Startup: Unable to load dynamic library 'apc.so' (tried: /usr/lib/php/20190902/apc.so (/usr/lib/php/20190902/apc.so: undefined symbol: zif_apcu_store), /usr/lib/php/20190902/apc.so.so (/usr/lib/php/20190902/apc.so.so: cannot open shared object file: No such file or directory)) at Unknown#0
4

You should find in your php.ini file and your dir /etc/php/7.x//conf.d/.ini for a duplicate of the loading module.

It is hard to tell you where it is loaded twice. You should search for a php solution as it is not a nextcloud issue.

5

ok, anyway thanks a lot for the help

6

hello again, it turns out that reviewing the history of the commands executed in the console I filtered which could be apcu. To my surprise I had already enabled apcu some time ago but not exactly in the default file but in a new file that I named cache.ini which I did not check. The problem was quickly resolved upon realizing the error. Greetings and thanks again.

7

Dear, please guide
i am unable to find mine
here is my gerp for apc

/etc/php/7.4/cli/conf.d/20-apcu.ini,
/etc/php/7.4/cli/conf.d/25-apcu_bc.ini
apc
apcu
apc.coredump_unmap => Off => Off
apc.enable_cli => On => On
apc.enabled => On => On
apc.entries_hint => 4096 => 4096
apc.gc_ttl => 3600 => 3600
apc.mmap_file_mask => no value => no value
apc.preload_path => no value => no value
apc.serializer => php => php
apc.shm_segments => 1 => 1
apc.shm_size => 32M => 32M
apc.slam_defense => Off => Off
apc.smart => 0 => 0
apc.ttl => 0 => 0
apc.use_request_time => Off => Off

8

hi friend, check that you don’t have a file called cache.ini, there was the additional configuration repeated in my case