[Bug]: Calendar federation breaks calendar for recieving party #57162
Description
⚠️ 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
When sharing a calendar from one instance to another using trusted federation, the receiving instance is unable to use the calendar integration. The receiving instance now responds with 500 error codes. Neither the UI nor the CalDAV API works.
CalDav responds with:
<?xml version="1.0" encoding="utf-8"?>
<d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">
<s:exception>TypeError</s:exception>
<s:message>A type error occurred. For more details, please refer to the logs, which provide additional context about the type error.</s:message>
</d:error>
Steps to reproduce
- Create a calendar on instance A
- Add the receiving instance as a trusted federation partner (both instances have to do this)
- Federate (share) a calendar to a user on instance B
- Now, instance B's user's calendar page loads indefinitely (caused by 500 errors in the backend) and CalDav does not work.
Expected behavior
The calendar (and all the other ones) appear in instance B's user calendar, and CalDav continues to work.
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?
Updated from a MINOR version (ex. 32.0.1 to 32.0.2)
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_proxies": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"cloud.example.de"
],
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"dbtype": "mysql",
"version": "32.0.3.2",
"overwrite.cli.url": "https:\/\/cloud.example.de",
"overwritehost": "cloud.example.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,
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_smtpmode": "smtp",
"mail_sendmailmode": "smtp",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "587",
"mail_smtpauthtype": "LOGIN",
"mail_smtpauth": 1,
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
"app_install_overwrite": [
"admin_notifications",
"whiteboard",
"breezedark",
"bruteforcesettings",
"twofactor_webauthn",
"twofactor_admin",
"talk_matterbridge",
"ransomware_protection",
"flow_notifications",
"apporder",
"carnet",
"richdocumentscode",
"riotchat",
"quota_warning",
"appointments",
"workflow_ocr",
"gpxpod",
"twofactor_nextcloud_notification",
"impersonate",
"keeweb",
"camerarawpreviews"
],
"filelocking.enabled": true,
"memcache.local": "\\OC\\Memcache\\APCu",
"memcache.distributed": "\\OC\\Memcache\\Redis",
"memcache.locking": "\\OC\\Memcache\\Redis",
"redis": {
"host": "***REMOVED SENSITIVE VALUE***",
"port": 0,
"timeout": 1.5,
"dbindex": 2
},
"maintenance": false,
"default_phone_region": "DE",
"theme": "",
"loglevel": 0,
"has_rebuilt_cache": true,
"updater.release.channel": "stable",
"maintenance_window_start": 1,
"memories.db.triggers.fcu": true,
"memories.exiftool": "\/var\/www\/cloud_example_de\/apps\/memories\/bin-ext\/exiftool-amd64-glibc",
"memories.vod.path": "\/var\/www\/cloud_example_de\/apps\/memories\/bin-ext\/go-vod-amd64",
"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"
],
"forbidden_filename_characters": [
"<",
">",
":",
"\"",
"|",
"?",
"*",
"\\",
"\/"
],
"forbidden_filename_extensions": [
" ",
".",
".filepart",
".part"
],
"updater.secret": "***REMOVED SENSITIVE VALUE***",
"memories.vod.ffmpeg": "\/usr\/bin\/ffmpeg",
"memories.vod.ffprobe": "\/usr\/bin\/ffprobe"
}
}List of activated Apps
Enabled:
- activity: 5.0.0-dev.0
- admin_audit: 1.22.0
- app_api: 32.0.0
- apporder: 0.15.0
- bruteforcesettings: 5.0.0-dev.0
- calendar: 6.1.2
- camerarawpreviews: 0.8.8
- cloud_federation_api: 1.16.0
- comments: 1.22.0
- contacts: 8.1.2
- contactsinteraction: 1.13.1
- dashboard: 7.12.0
- dav: 1.34.2
- deck: 1.16.2
- drawio: 3.1.2
- external: 7.0.0
- federatedfilesharing: 1.22.0
- federation: 1.22.0
- files: 2.4.0
- files_antivirus: 6.1.0
- files_downloadlimit: 5.0.0-dev.0
- files_external: 1.24.0
- files_pdfviewer: 5.0.0-dev.0
- files_reminders: 1.5.0
- files_sharing: 1.24.1
- files_trashbin: 1.22.0
- files_versions: 1.25.0
- firstrunwizard: 5.0.0-dev.0
- flow_notifications: 3.0.0
- gpxpod: 7.2.1
- groupfolders: 20.1.6
- imageconverter: 2.1.0
- impersonate: 3.0.0
- integration_paperless: 1.0.7
- logreader: 5.0.0-dev.0
- lookup_server_connector: 1.20.0
- memories: 7.7.0
- nextcloud_announcements: 4.0.0-dev.0
- notes: 4.12.4
- notifications: 5.0.0-dev.0
- oauth2: 1.20.0
- onlyoffice: 9.11.0
- password_policy: 4.0.0-dev.0
- photos: 5.0.0-dev.1
- privacy: 4.0.0-dev.0
- profile: 1.1.0
- provisioning_api: 1.22.0
- quota_warning: 1.22.0
- recommendations: 5.0.0-dev.0
- related_resources: 3.0.0-dev.0
- serverinfo: 4.0.0-dev.0
- settings: 1.15.1
- sharebymail: 1.22.0
- suspicious_login: 10.0.0-dev.0
- systemtags: 1.22.0
- tasks: 0.17.1
- text: 6.0.1
- theming: 2.7.0
- twofactor_admin: 4.9.0
- twofactor_backupcodes: 1.21.0
- twofactor_nextcloud_notification: 6.0.0-dev.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
- workflowengine: 2.14.0
Disabled:
- circles: 32.0.0 (installed 26.0.0)
- encryption: 2.20.0 (installed 2.11.0)
- files_rightclick: 0.15.1 (installed 1.6.0)
- forms: 4.3.4 (installed 4.3.4)
- health: 2.2.2 (installed 2.2.2)
- richdocuments: 8.5.3 (installed 8.5.3)
- secrets: 2.1.1 (installed 2.1.1)
- spreed: 21.1.2 (installed 21.1.2)
- support: 4.0.0-dev.0 (installed 1.9.0)
- survey_client: 4.0.0-dev.0 (installed 1.9.0)
- user_ldap: 1.23.0
- whiteboard: 1.5.0 (installed 1.5.0)Nextcloud Signing status
No errors have been found.Nextcloud Logs
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***"]},{"file":"/var/www/cloud_example_de/lib/private/Calendar/Manager.php","line":178,"function":"array_map"},{"file":"/var/www/cloud_example_de/apps/dav/lib/CalDAV/Status/StatusService.php","line":152,"function":"getCalendarsForPrincipal","class":"OC\\Calendar\\Manager","type":"->"},{"file":"/var/www/cloud_example_de/apps/dav/lib/CalDAV/Status/StatusService.php","line":56,"function":"getCalendarEvents","class":"OCA\\DAV\\CalDAV\\Status\\StatusService","type":"->"},{"file":"/var/www/cloud_example_de/apps/user_status/lib/Listener/UserLiveStatusListener.php","line":52,"function":"processCalendarStatus","class":"OCA\\DAV\\CalDAV\\Status\\StatusService","type":"->"},{"file":"/var/www/cloud_example_de/lib/private/EventDispatcher/ServiceEventListener.php","line":57,"function":"handle","class":"OCA\\UserStatus\\Listener\\UserLiveStatusListener","type":"->"},{"file":"/var/www/cloud_example_de/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":220,"function":"__invoke","class":"OC\\EventDispatcher\\ServiceEventListener","type":"->"},{"file":"/var/www/cloud_example_de/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":56,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/cloud_example_de/lib/private/EventDispatcher/EventDispatcher.php","line":67,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/cloud_example_de/lib/private/EventDispatcher/EventDispatcher.php","line":79,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/cloud_example_de/apps/user_status/lib/Controller/HeartbeatController.php","line":71,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/cloud_example_de/lib/private/AppFramework/Http/Dispatcher.php","line":204,"function":"heartbeat","class":"OCA\\UserStatus\\Controller\\HeartbeatController","type":"->"},{"file":"/var/www/cloud_example_de/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/cloud_example_de/lib/private/AppFramework/App.php","line":153,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/cloud_example_de/lib/private/Route/Router.php","line":321,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/cloud_example_de/ocs/v1.php","line":61,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/cloud_example_de/ocs/v2.php","line":8,"args":["/var/www/cloud_example_de/ocs/v1.php"],"function":"require_once"}],"File":"/var/www/cloud_example_de/apps/dav/lib/CalDAV/CalendarProvider.php","Line":70},"message":"array_merge(): Argument #2 must be of type array, null given in file '/var/www/cloud_example_de/apps/dav/lib/CalDAV/CalendarProvider.php' line 70","exception":[],"CustomMessage":"array_merge(): Argument #2 must be of type array, null given in file '/var/www/cloud_example_de/apps/dav/lib/CalDAV/CalendarProvider.php' line 70"},"id":"694340c8234c2"}
{"reqId":"oxRghgV654NIKcW5ABVz","level":2,"time":"2025-12-17T23:46:44+00:00","remoteAddr":"XXX.XXX.XXX.XXX","user":"grey","app":"PHP","method":"GET","url":"/ocs/v2.php/apps/user_status/api/v1/user_status?format=json","message":"Undefined array key \"calendars/grey/XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX\" at /var/www/cloud_example_de/apps/dav/lib/CalDAV/CalendarProvider.php#70","userAgent":"Mozilla/5.0 (Windows) mirall/3.17.3 (build 20251009) (Nextcloud, windows-10.0.19045 ClientArchitecture: x86_64 OsArchitecture: x86_64)","version":"32.0.3.2","clientReqId":"23704d9e-XXXX-XXXX-81f7-fccfcaea5ec6","data":{"app":"PHP"},"id":"694340e75ef7b"}Additional info
No response