[Bug]: memcache.local

[Schubi2024]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Bei aktiviertem memcache.local funktionieren einige Apps nach einiger Zeit nicht mehr. Es kommt die Fehlermeldung "Seite nicht gefunden".
Es sind nicht Core-Apps wie ocs_api_viewer, passwords, sharereview usw. betroffen.
Das Problem tritt bei
'memcache.local' => '\OC\Memcache\APCu'
und
'memcache.locking' => '\OC\Memcache\Redis'
auf.
Ein umschalten des 'memcache.local' hilft nur temporär für einige Zeit. Nach mehrmaligem hin her her schalten muss ich den 'memcache.local' deaktivieren etwas warten und kann dann von vorn mit aktivieren und deaktivieren anfangen.

---

When memcache.local is enabled, some apps stop working after a while. The error message "Page not found" appears.
Core apps such as ocs_api_viewer, passwords, sharereview, etc. are not affected.
The problem occurs with
'memcache.local' => '\OC\Memcache\APCu'
and
'memcache.locking' => '\OC\Memcache\Redis'.

Switching 'memcache.local' only helps temporarily for a while. After switching back and forth several times, I have to deactivate 'memcache.local', wait a while, and then I can start activating and deactivating again.

Steps to reproduce

1.aktivieren: 'memcache.local' => '\OC\Memcache\APCu'
2.warten bis Fehler auftritt
3.aktivieren: 'memcache.local' => '\OC\Memcache\Redis'
4.warten bis Fehler auftritt
5.'memcache.local' komplett deaktivieren
6. warten und bei 1. wieder anfangen

---

1. Activate: 'memcache.local' => '\OC\Memcache\APCu'
2. Wait until an error occurs
3. Activate: 'memcache.local' => '\OC\Memcache\Redis'
4. Wait until an error occurs
5. Completely deactivate 'memcache.local'
6. Wait and start again at 1.

Expected behavior

Das die Apps mit aktiviertem 'memcache.local' wie unter NC 31 funktionieren.

Nextcloud Server version

32

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.4

Web server

Nginx

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

Upgraded to a MAJOR version (ex. 31 to 32)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "nextcloud.my.de",
            "Nextcloud.my.local"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "32.0.2.2",
        "overwrite.cli.url": "https:\/\/nextcloud.my.de",
        "overwritehost": "nextcloud.my.de",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "activity_expire_days": 14,
        "auth.bruteforce.protection.enabled": true,
        "forbidden_filenames": [
            ".htaccess",
            "Thumbs.db",
            "thumbs.db"
        ],
        "cron_log": true,
        "enable_previews": true,
        "enabledPreviewProviders": [
            "OC\\Preview\\PNG",
            "OC\\Preview\\JPEG",
            "OC\\Preview\\GIF",
            "OC\\Preview\\BMP",
            "OC\\Preview\\XBitmap",
            "OC\\Preview\\Movie",
            "OC\\Preview\\PDF",
            "OC\\Preview\\MP3",
            "OC\\Preview\\TXT",
            "OC\\Preview\\MarkDown",
            "OC\\Preview\\Image",
            "OC\\Preview\\HEIC",
            "OC\\Preview\\TIFF",
            "OC\\Preview\\MKV",
            "OC\\Preview\\MP4",
            "OC\\Preview\\AVI"
        ],
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "filesystem_check_changes": 1,
        "check_data_directory_permissions": false,
        "default_phone_region": "DE",
        "default_language": "de",
        "default_locale": "de_DE",
        "lost_password_link": "disabled",
        "filelocking.enabled": "false",
        "allow_self_signed": true,
        "allow_local_address": true,
        "allow_local_remote_servers": true,
        "share_folder": "\/Shares",
        "htaccess.RewriteBase": "\/",
        "integrity.check.disabled": false,
        "knowledgebaseenabled": false,
        "logfile": "\/var\/tmp\/nextcloud.log",
        "loglevel": 2,
        "logtimezone": "Europe\/Berlin",
        "log_rotate_size": 104857600,
        "maintenance": false,
        "maintenance_window_start": 1,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "cache_app_config": true,
        "overwriteprotocol": "https",
        "preview_max_x": 2048,
        "preview_max_y": 2048,
        "preview_max_scale_factor": 1,
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379,
            "password": "***REMOVED SENSITIVE VALUE***",
            "timeout": 0.5,
            "dbindex": 1
        },
        "quota_include_external_storage": false,
        "skeletondirectory": "\/mnt\/nextclouddata\/benutzer_vorlage",
        "theme": "",
        "trashbin_retention_obligation": "auto, 7",
        "updater.release.channel": "stable",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "mail_smtptimeout": 30,
        "mail_smtpauthtype": "NTLM",
        "mail_smtpauth": 1,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "app_install_overwrite": [],
        "twofactor_enforced": "true",
        "twofactor_enforced_groups": [],
        "twofactor_enforced_excluded_groups": [
            "Speziale"
        ],
        "remember_login_cookie_lifetime": 0,
        "session_lifetime": 900,
        "session_keepalive": false,
        "auto_logout": true,
        "forbidden_filename_characters": [
            "<",
            ">",
            ":",
            "\"",
            "|",
            "?",
            "*",
            "\\",
            "\/"
        ],
        "forbidden_filename_extensions": [
            " ",
            ".",
            ".filepart",
            ".part"
        ],
        "memories.db.triggers.fcu": true,
        "memories.exiftool": "\/var\/www\/nextcloud\/apps\/memories\/bin-ext\/exiftool-amd64-glibc",
        "memories.vod.path": "\/var\/www\/nextcloud\/apps\/memories\/bin-ext\/go-vod-amd64",
        "memories.vod.ffmpeg": "\/usr\/bin\/ffmpeg",
        "memories.vod.ffprobe": "\/usr\/bin\/ffprobe",
        "memories.gis_type": 1,
        "preview_max_memory": 2028,
        "preview_max_filesize_image": 512,
        "forbidden_filename_basenames": [
            "con",
            "prn",
            "aux",
            "nul",
            "com0",
            "com1",
            "com2",
            "com3",
            "com4",
            "com5",
            "com6",
            "com7",
            "com8",
            "com9",
            "com\u00b9",
            "com\u00b2",
            "com\u00b3",
            "lpt0",
            "lpt1",
            "lpt2",
            "lpt3",
            "lpt4",
            "lpt5",
            "lpt6",
            "lpt7",
            "lpt8",
            "lpt9",
            "lpt\u00b9",
            "lpt\u00b2",
            "lpt\u00b3"
        ],
        "defaultapp": "dashboard"
    }
}

List of activated Apps

Enabled:
  - activity: 5.0.0-dev.0
  - admin_audit: 1.22.0
  - announcementcenter: 7.2.2
  - bruteforcesettings: 5.0.0-dev.0
  - calendar: 6.1.0
  - circles: 32.0.0
  - cloud_federation_api: 1.16.0
  - collectives: 3.3.0
  - comments: 1.22.0
  - contacts: 8.1.0
  - contactsinteraction: 1.13.1
  - csp_editor: 1.8.0
  - dashboard: 7.12.0
  - dav: 1.34.2
  - deck: 1.16.2
  - external: 7.0.0
  - federatedfilesharing: 1.22.0
  - federation: 1.22.0
  - files: 2.4.0
  - files_accesscontrol: 3.0.2
  - files_antivirus: 6.1.0
  - files_automatedtagging: 3.0.1
  - files_downloadlimit: 5.0.0-dev.0
  - files_fulltextsearch: 32.0.2
  - files_pdfviewer: 5.0.0-dev.0
  - files_reminders: 1.5.0
  - files_retention: 3.0.0
  - files_sharing: 1.24.1
  - files_trashbin: 1.22.0
  - files_versions: 1.25.0
  - forms: 5.2.3
  - fulltextsearch: 32.0.0
  - fulltextsearch_elasticsearch: 32.0.0
  - impersonate: 3.0.0
  - integration_mastodon: 4.0.0
  - logreader: 5.0.0-dev.0
  - lookup_server_connector: 1.20.0
  - memories: 7.7.0
  - news: 27.2.0
  - nextcloud_announcements: 4.0.0-dev.0
  - notes: 4.12.4
  - notifications: 5.0.0-dev.0
  - notify_push: 1.2.1
  - oauth2: 1.20.0
  - ocs_api_viewer: 1.0.11
  - password_policy: 4.0.0-dev.0
  - passwords: 2025.11.20
  - photos: 5.0.0-dev.1
  - previewgenerator: 5.11.0
  - privacy: 4.0.0-dev.0
  - profile: 1.1.0
  - provisioning_api: 1.22.0
  - recommendations: 5.0.0-dev.0
  - related_resources: 3.0.0-dev.0
  - richdocuments: 9.0.2
  - richdocumentscode: 25.4.702
  - serverinfo: 4.0.0-dev.0
  - settings: 1.15.1
  - sharebymail: 1.22.0
  - sharereview: 2.0.0
  - spreed: 22.0.4
  - support: 4.0.0-dev.0
  - systemtags: 1.22.0
  - tables: 1.0.1
  - text: 6.0.1
  - theming: 2.7.0
  - thesearchpage: 1.2.16
  - twofactor_backupcodes: 1.21.0
  - twofactor_totp: 14.0.0
  - twofactor_webauthn: 2.4.1
  - updatenotification: 1.22.0
  - user_status: 1.12.0
  - viewer: 5.0.0-dev.0
  - weather_status: 1.12.0
  - webhook_listeners: 1.3.0
  - whiteboard: 1.4.2
  - workflow_script: 3.0.0
  - workflowengine: 2.14.0
Disabled:
  - app_api: 32.0.0 (installed 3.2.0)
  - encryption: 2.20.0
  - files_external: 1.24.0 (installed 1.23.0)
  - firstrunwizard: 5.0.0-dev.0 (installed 2.9.0)
  - survey_client: 4.0.0-dev.0 (installed 1.8.0)
  - suspicious_login: 10.0.0-dev.0
  - twofactor_nextcloud_notification: 6.0.0-dev.0 (installed 5.0.0)
  - user_ldap: 1.23.0

Nextcloud Signing status

Nextcloud Logs

Additional info

"cache_app_config": true, wurde von der Community vorgeschlagen brachte aber keine Erfolg.
Das Problem tritt unter Debian 12 und 13 sowie PHP 8.3 und 8.4 auf.

Das
'host' = '/var/run/redis/redis-server.sock',
'port' = 0,
oder das
'host' = '127.0.0.1',
'port' = 6379,
hat auch nicht geholfen.

---

"cache_app_config": true, was suggested by the community but did not work.
The problem occurs under Debian 12 and 13 as well as PHP 8.3 and 8.4.

The
'host' = '/var/run/redis/redis-server.sock',
'port' = 0,
or the
'host' = '127.0.0.1',
'port' = 6379,
did not help either.

[provokateurin]

@come-nc likely some issue with #52793?

[grnd-alt]

As a hint:
I had a similar sounding issue reported in deck nextcloud/deck#7387
I could only reproduce on a prod instance yet, but allowing the app only for some group triggered the same behavior.
Even after re-allowing all groups I get a 404 for that app.
@Schubi2024 maybe you could share if the apps that stop working are restricted to a group?

[provokateurin]

Ah that's a really good hint, this is probably due to wrong cache invalidation where the group and non-group are mixed!
So the solution is probably to cache the routes per user, as two different users might not see the same routes due to app group restrictions.

[Schubi2024]

Ja, die App hatten Berechtigungen. Ob das jetzt aber auschlaggebend war kann ich nicht genau sagen.
Nach meine Workaround waren die App-Berechtigungen verschwunden und ich musst sie neu setzten.
Das Problem trat dann auch mit den verschwunden Berechtigungen auf.

Workaround:

1. Alle nicht Core-Apps deaktivieren
2. Server reboot
3. Alle nicht Core-Apps wieder aktivieren
4. Server reboot

Das die Berechtigungen nach dem deaktivieren der Apps weg waren hatte ich er später festgestellt.

---

Yes, the app had permissions. However, I cannot say for certain whether that was the decisive factor.
After my workaround, the app permissions had disappeared and I had to reset them.
The problem then also occurred with the missing permissions.

Workaround:

1. Deactivate all non-core apps.
2. Reboot the server.
3. Reactivate all non-core apps.
4. Reboot the server.

I later discovered that the permissions were gone after deactivating the apps.

[provokateurin]

Fix is at #56906