[Bug]: "Error while running background job" -> "Recurring events are only allowed to generate 3500" #34442

fishfish-fish · 2022-10-05T15:41:48Z

⚠️ 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 (I've searched it).
Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
Nextcloud Server is running on 64bit capable CPU, PHP and OS.
I agree to follow Nextcloud's Code of Conduct.

Bug description

Using Nextcloud from the beginning, migrated from OwnCloud long time ago on dedicated server and up to 100 users primary for file sharing and calendar services.
Recently (after recent Nextcloud update) I started to notice unusual messages at regualr (5 and 10 minutes) basis:
`[core] Error: Sabre\VObject\Recur\MaxInstancesExceededException: Recurring events are only allowed to generate 3500 at <>

/var/www/html/nextcloud/apps/dav/lib/CalDAV/Reminder/ReminderService.php line 639
Sabre\VObject\Recur\EventIterator->valid()
/var/www/html/nextcloud/apps/dav/lib/CalDAV/Reminder/ReminderService.php line 139
OCA\DAV\CalDAV\Reminder\ReminderService->getVEventByRecurrenceId()
/var/www/html/nextcloud/apps/dav/lib/BackgroundJob/EventReminderJob.php line 69
OCA\DAV\CalDAV\Reminder\ReminderService->processReminders()
/var/www/html/nextcloud/lib/public/BackgroundJob/Job.php line 79
OCA\DAV\BackgroundJob\EventReminderJob->run()
/var/www/html/nextcloud/lib/public/BackgroundJob/TimedJob.php line 95
OCP\BackgroundJob\Job->execute()
/var/www/html/nextcloud/cron.php line 151
OCP\BackgroundJob\TimedJob->execute()

at 2022-10-05T18:00:03+03:00`

At first I thought its related to recurring events in calendar, so I started to check in database for events in oc_calendar_reminders with is_recurring = 1 for further investigation. I did checks down to inspecting object_id contents and calendar_id but no luck. I delete "old" events but that didn't help.

Error appear in log each 5 and 10 minutes, cron is set to run at */5.

Steps to reproduce

I have no way to reproduce it, as this messages started relatively recently, same error with stable recurrence of 10 minutes. But in general it looks like:

Install Nextcloud 24.0.5.1
Use it normally as file storage/calendar server
check logs regularly

Expected behavior

No messages with Error severity.

Installation method

Community Manual installation with Archive

Operating system

Debian/Ubuntu

PHP engine version

PHP 7.4

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. 22.2.3 to 22.2.4)

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***",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "installed": true,
        "ldapIgnoreNamingRules": false,
        "ldapUserCleanupInterval": 51,
        "forcessl": true,
        "loglevel": 2,
        "log_type": "file",
        "logfile": "\/var\/log\/nextcloud\/nextcloud.log",
        "log_rotate_size": 5242880,
        "logtimezone": "Europe\/Athens",
        "log_query": false,
        "defaultapp": "files",
        "maintenance": false,
        "theme": "",
        "mail_smtpmode": "smtp",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpdebug": false,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "filelocking.enabled": true,
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0,
            "password": "***REMOVED SENSITIVE VALUE***",
            "dbindex": 0
        },
        "trusted_domains": [
            "nc.example.com"
        ],
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "version": "24.0.5.1",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "appstore.experimental.enabled": true,
        "trashbin_retention_obligation": "auto",
        "ldapProviderFactory": "\\OCA\\User_LDAP\\LDAPProviderFactory",
        "updater.release.channel": "stable",
        "overwrite.cli.url": "https:\/\/nc.example.com",
        "htaccess.RewriteBase": "\/",
        "mysql.utf8mb4": true,
        "app_install_overwrite": [
            "keeweb"
        ],
        "config_is_read_only": false,
        "data-fingerprint": "cfab618149e5103031a21607a2309ca7",
        "mail_sendmailmode": "smtp",
        "auth.bruteforce.protection.enabled": true,
        "enable_previews": false,
        "hashingThreads": 1,
        "hashingMemoryCost": 2048,
        "hashingTimeCost": 1,
        "hashingCost": 6,
        "mail_smtpsecure": "tls",
        "default_phone_region": "UA",
        "skeletondirectory": ""
    }
}

List of activated Apps

Enabled:
  - activity: 2.16.0
  - admin_audit: 1.14.0
  - breezedark: 24.0.2
  - bruteforcesettings: 2.4.0
  - calendar: 3.5.0
  - circles: 24.0.1
  - cloud_federation_api: 1.7.0
  - comments: 1.14.0
  - contacts: 4.2.2
  - contactsinteraction: 1.5.0
  - dav: 1.22.0
  - extract: 1.3.5
  - federatedfilesharing: 1.14.0
  - files: 1.19.0
  - files_downloadactivity: 1.13.0
  - files_external: 1.16.1
  - files_pdfviewer: 2.5.0
  - files_rightclick: 1.3.0
  - files_sharing: 1.16.2
  - files_trashbin: 1.14.0
  - files_versions: 1.17.0
  - files_videoplayer: 1.13.0
  - firstrunwizard: 2.13.0
  - groupfolders: 12.0.1
  - guests: 2.3.0
  - impersonate: 1.11.0
  - keeweb: 0.6.9
  - logreader: 2.9.0
  - lookup_server_connector: 1.12.0
  - nextcloud_announcements: 1.13.0
  - notes: 4.5.1
  - notifications: 2.12.1
  - oauth2: 1.12.0
  - password_policy: 1.14.0
  - photos: 1.6.0
  - privacy: 1.8.0
  - provisioning_api: 1.14.0
  - quota_warning: 1.14.0
  - recommendations: 1.3.0
  - serverinfo: 1.14.0
  - settings: 1.6.0
  - sharebymail: 1.14.0
  - support: 1.7.0
  - systemtags: 1.14.0
  - tasks: 0.14.4
  - text: 3.5.1
  - theming: 1.15.0
  - twofactor_backupcodes: 1.13.0
  - twofactor_email: 2.7.0
  - updatenotification: 1.14.0
  - user_ldap: 1.14.1
  - viewer: 1.8.0
  - weather_status: 1.4.0
  - workflowengine: 2.6.0
Disabled:
  - accessibility: 1.6.0
  - dashboard: 7.0.0
  - encryption: 1.0.0
  - event_update_notification: 1.5.0
  - federation: 0.0.4
  - survey_client: 1.6.0
  - user_status: 1.0.1

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

{"reqId":"wWD7XKLVaSXKAPsCdpdl","level":3,"time":"2022-10-05T18:35:03+03:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )","userAgent":"--","version":"24.0.5.1","exception":{"Exception":"Sabre\\VObject\\Recur\\MaxInstancesExceededException","Message":"Recurring events are only allowed to generate 3500","Code":0,"Trace":[{"file":"/var/www/html/nextcloud/apps/dav/lib/CalDAV/Reminder/ReminderService.php","line":639,"function":"valid","class":"Sabre\\VObject\\Recur\\EventIterator","type":"->"},{"file":"/var/www/html/nextcloud/apps/dav/lib/CalDAV/Reminder/ReminderService.php","line":139,"function":"getVEventByRecurrenceId","class":"OCA\\DAV\\CalDAV\\Reminder\\ReminderService","type":"->"},{"file":"/var/www/html/nextcloud/apps/dav/lib/BackgroundJob/EventReminderJob.php","line":69,"function":"processReminders","class":"OCA\\DAV\\CalDAV\\Reminder\\ReminderService","type":"->"},{"file":"/var/www/html/nextcloud/lib/public/BackgroundJob/Job.php","line":79,"function":"run","class":"OCA\\DAV\\BackgroundJob\\EventReminderJob","type":"->"},{"file":"/var/www/html/nextcloud/lib/public/BackgroundJob/TimedJob.php","line":95,"function":"execute","class":"OCP\\BackgroundJob\\Job","type":"->"},{"file":"/var/www/html/nextcloud/cron.php","line":151,"function":"execute","class":"OCP\\BackgroundJob\\TimedJob","type":"->"}],"File":"/var/www/html/nextcloud/3rdparty/sabre/vobject/lib/Recur/EventIterator.php","Line":306,"message":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )","CustomMessage":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )"},"id":"633da551899ba"}
{"reqId":"tQUKuuUZViplWlo5sRv2","level":3,"time":"2022-10-05T18:25:03+03:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )","userAgent":"--","version":"24.0.5.1","exception":{"Exception":"Sabre\\VObject\\Recur\\MaxInstancesExceededException","Message":"Recurring events are only allowed to generate 3500","Code":0,"Trace":[{"file":"/var/www/html/nextcloud/apps/dav/lib/CalDAV/Reminder/ReminderService.php","line":639,"function":"valid","class":"Sabre\\VObject\\Recur\\EventIterator","type":"->"},{"file":"/var/www/html/nextcloud/apps/dav/lib/CalDAV/Reminder/ReminderService.php","line":139,"function":"getVEventByRecurrenceId","class":"OCA\\DAV\\CalDAV\\Reminder\\ReminderService","type":"->"},{"file":"/var/www/html/nextcloud/apps/dav/lib/BackgroundJob/EventReminderJob.php","line":69,"function":"processReminders","class":"OCA\\DAV\\CalDAV\\Reminder\\ReminderService","type":"->"},{"file":"/var/www/html/nextcloud/lib/public/BackgroundJob/Job.php","line":79,"function":"run","class":"OCA\\DAV\\BackgroundJob\\EventReminderJob","type":"->"},{"file":"/var/www/html/nextcloud/lib/public/BackgroundJob/TimedJob.php","line":95,"function":"execute","class":"OCP\\BackgroundJob\\Job","type":"->"},{"file":"/var/www/html/nextcloud/cron.php","line":151,"function":"execute","class":"OCP\\BackgroundJob\\TimedJob","type":"->"}],"File":"/var/www/html/nextcloud/3rdparty/sabre/vobject/lib/Recur/EventIterator.php","Line":306,"message":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )","CustomMessage":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )"},"id":"633da55189b43"}
{"reqId":"2yxbX2hoSyEFVGKmtA7s","level":3,"time":"2022-10-05T18:15:02+03:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )","userAgent":"--","version":"24.0.5.1","exception":{"Exception":"Sabre\\VObject\\Recur\\MaxInstancesExceededException","Message":"Recurring events are only allowed to generate 3500","Code":0,"Trace":[{"file":"/var/www/html/nextcloud/apps/dav/lib/CalDAV/Reminder/ReminderService.php","line":639,"function":"valid","class":"Sabre\\VObject\\Recur\\EventIterator","type":"->"},{"file":"/var/www/html/nextcloud/apps/dav/lib/CalDAV/Reminder/ReminderService.php","line":139,"function":"getVEventByRecurrenceId","class":"OCA\\DAV\\CalDAV\\Reminder\\ReminderService","type":"->"},{"file":"/var/www/html/nextcloud/apps/dav/lib/BackgroundJob/EventReminderJob.php","line":69,"function":"processReminders","class":"OCA\\DAV\\CalDAV\\Reminder\\ReminderService","type":"->"},{"file":"/var/www/html/nextcloud/lib/public/BackgroundJob/Job.php","line":79,"function":"run","class":"OCA\\DAV\\BackgroundJob\\EventReminderJob","type":"->"},{"file":"/var/www/html/nextcloud/lib/public/BackgroundJob/TimedJob.php","line":95,"function":"execute","class":"OCP\\BackgroundJob\\Job","type":"->"},{"file":"/var/www/html/nextcloud/cron.php","line":151,"function":"execute","class":"OCP\\BackgroundJob\\TimedJob","type":"->"}],"File":"/var/www/html/nextcloud/3rdparty/sabre/vobject/lib/Recur/EventIterator.php","Line":306,"message":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )","CustomMessage":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )"},"id":"633da55189c17"}
{"reqId":"WxBhXZVAOpQsyxQnaLTv","level":3,"time":"2022-10-05T18:10:02+03:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","message":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )","userAgent":"--","version":"24.0.5.1","exception":{"Exception":"Sabre\\VObject\\Recur\\MaxInstancesExceededException","Message":"Recurring events are only allowed to generate 3500","Code":0,"Trace":[{"file":"/var/www/html/nextcloud/apps/dav/lib/CalDAV/Reminder/ReminderService.php","line":639,"function":"valid","class":"Sabre\\VObject\\Recur\\EventIterator","type":"->"},{"file":"/var/www/html/nextcloud/apps/dav/lib/CalDAV/Reminder/ReminderService.php","line":139,"function":"getVEventByRecurrenceId","class":"OCA\\DAV\\CalDAV\\Reminder\\ReminderService","type":"->"},{"file":"/var/www/html/nextcloud/apps/dav/lib/BackgroundJob/EventReminderJob.php","line":69,"function":"processReminders","class":"OCA\\DAV\\CalDAV\\Reminder\\ReminderService","type":"->"},{"file":"/var/www/html/nextcloud/lib/public/BackgroundJob/Job.php","line":79,"function":"run","class":"OCA\\DAV\\BackgroundJob\\EventReminderJob","type":"->"},{"file":"/var/www/html/nextcloud/lib/public/BackgroundJob/TimedJob.php","line":95,"function":"execute","class":"OCP\\BackgroundJob\\Job","type":"->"},{"file":"/var/www/html/nextcloud/cron.php","line":151,"function":"execute","class":"OCP\\BackgroundJob\\TimedJob","type":"->"}],"File":"/var/www/html/nextcloud/3rdparty/sabre/vobject/lib/Recur/EventIterator.php","Line":306,"message":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )","CustomMessage":"Error while running background job (class: OCA\\DAV\\BackgroundJob\\EventReminderJob, arguments: )"},"id":"633da55189c55"}

Additional info

No response

fishfish-fish · 2022-10-11T14:00:07Z

May be its something related to #29896

oktayacikalin · 2023-01-13T23:00:10Z

Looks like v25.0.3 will have that PR. I hope, we'll see it soon. I've a bunch of events which trigger this error message.

szaimen · 2023-01-23T15:37:47Z

Hi, please update to 24.0.9 or better 25.0.3 and report back if it fixes the issue. Thank you!

My goal is to add a label like e.g. 25-feedback to this ticket of an up-to-date major Nextcloud version where the bug could be reproduced. However this is not going to work without your help. So thanks for all your effort!

If you don't manage to reproduce the issue in time and the issue gets closed but you can reproduce the issue afterwards, feel free to create a new bug report with up-to-date information by following this link: https://github.com/nextcloud/server/issues/new?assignees=&labels=bug%2C0.+Needs+triage&template=BUG_REPORT.yml&title=%5BBug%5D%3A+

fishfish-fish · 2023-01-23T17:54:19Z

Hi, please update to 24.0.9 or better 25.0.3 and report back if it fixes the issue. Thank you!

Hi! Updated to 25.0.3 week ago, but same errors present. Any suggestions how I can track it down to the issue?

Snousmoumryk · 2023-01-23T18:31:41Z

Hi, please update to 24.0.9 or better 25.0.3 and report back if it fixes the issue. Thank you!

Have running 24/7 instance of NC 24.0.9.

Two active users have recurring events with an indefinite end date. Error "Recurring events are only allowed to generate 3500" not fixed, and reminder emails are not sent.

Sending emails from NC is configured and works fine, and for one-time events, emails are sent.

Let us know what kind of debug info you need.

oktayacikalin · 2023-01-23T21:00:43Z

I'm now on 25.0.3 and the code change seems to work as indented. At least I'm not seeing this error anymore.

fishfish-fish · 2023-01-25T10:29:30Z

Comment.
Our NC setup have 50+ users with shared calendars for everyone. Its a big number of calendars to check even via guessing SQL queries I've tried some time ago. So any suggestions on that would be helpful since its a Error level of message.

fishfish-fish · 2023-01-25T10:30:08Z

My mistake click on "close with comment", sorry.

fishfish-fish · 2023-01-25T10:41:18Z

Also I have calcardbackup configued, and I can browse exported files for anomalies if any. That helped me once to check wrong timezone configured for some users. May be there are some obvious points for calendar files I can check.
Thank you in advance!

fishfish-fish · 2023-02-10T10:43:22Z

Issue still present, I see a lot of this messages in the log. Nextcloud 25.0.3..

fishfish-fish · 2023-02-10T10:57:06Z

Hi, please update to 24.0.9 or better 25.0.3 and report back if it fixes the issue. Thank you!

My goal is to add a label like e.g. 25-feedback to this ticket of an up-to-date major Nextcloud version where the bug could be reproduced. However this is not going to work without your help. So thanks for all your effort!

If you don't manage to reproduce the issue in time and the issue gets closed but you can reproduce the issue afterwards, feel free to create a new bug report with up-to-date information by following this link: https://github.com/nextcloud/server/issues/new?assignees=&labels=bug%2C0.+Needs+triage&template=BUG_REPORT.yml&title=%5BBug%5D%3A+

Filed as new bug as suggested. #36659

fishfish-fish · 2023-02-10T12:30:26Z

Is anything I can do on my side to help track this issue? I can proceed via SQL queries inspection or evaluate calendar dump to find that caused that behavior.
It might be the case that some users misuse calendar events that caused such errors.
Thank you in advance!

fishfish-fish · 2023-02-10T13:40:41Z

I found that some users set "End repeat" as "never" instead of some date or number of occurences. For their side its look like normal to not predict end date for such events, I can understand that. That is why theorepically this can lead to 3500+ events..

fishfish-fish · 2023-03-01T12:32:17Z

With 25.0.4 I can't see those messages anymore.

joshtrichards · 2023-08-28T21:21:05Z

Hi @rybaha - Just wanted to send one last check in to make sure you haven't seen this return? We'll close out this issue if it seems fixed. Thanks!

fishfish-fish · 2023-08-29T09:17:07Z

Hi @rybaha - Just wanted to send one last check in to make sure you haven't seen this return? We'll close out this issue if it seems fixed. Thanks!

No new messages in logs. Please close this ticket.
Thank you!

fishfish-fish added 0. Needs triage Pending check for reproducibility or if it fits our roadmap bug labels Oct 5, 2022

szaimen added the needs info label Jan 23, 2023

szaimen added 24-feedback and removed needs info labels Jan 23, 2023

fishfish-fish closed this as completed Jan 25, 2023

fishfish-fish reopened this Jan 25, 2023

szaimen added the 25-feedback label Feb 10, 2023

szaimen mentioned this issue Feb 10, 2023

[Bug]: Error core Sabre\VObject\Recur\MaxInstancesExceededException: Recurring events are only allowed to generate 3500 #36659

Closed

9 tasks

szaimen removed the 24-feedback label May 2, 2023

joshtrichards added needs info feature: caldav Related to CalDAV internals labels Aug 28, 2023

joshtrichards closed this as completed Aug 29, 2023

eibex mentioned this issue Feb 18, 2024

[Bug]: MaxInstancesExceededException Recurring events are only allowed to generate 3500 - Error cleaning up reminders of a calendar object #43647

Open

8 tasks

ldidry mentioned this issue Sep 12, 2024

🥅 — Catch MaxInstancesExceededException on calendar events #47924

Merged

4 tasks

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[Bug]: "Error while running background job" -> "Recurring events are only allowed to generate 3500" #34442

[Bug]: "Error while running background job" -> "Recurring events are only allowed to generate 3500" #34442

fishfish-fish commented Oct 5, 2022

fishfish-fish commented Oct 11, 2022

oktayacikalin commented Jan 13, 2023

szaimen commented Jan 23, 2023

fishfish-fish commented Jan 23, 2023

Snousmoumryk commented Jan 23, 2023

oktayacikalin commented Jan 23, 2023

fishfish-fish commented Jan 25, 2023

fishfish-fish commented Jan 25, 2023

fishfish-fish commented Jan 25, 2023

fishfish-fish commented Feb 10, 2023

fishfish-fish commented Feb 10, 2023 •

edited

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fishfish-fish commented Feb 10, 2023

fishfish-fish commented Feb 10, 2023

fishfish-fish commented Mar 1, 2023

joshtrichards commented Aug 28, 2023

fishfish-fish commented Aug 29, 2023

[Bug]: "Error while running background job" -> "Recurring events are only allowed to generate 3500" #34442

[Bug]: "Error while running background job" -> "Recurring events are only allowed to generate 3500" #34442

Comments

fishfish-fish commented Oct 5, 2022

⚠️ This issue respects the following points: ⚠️

Bug description

Steps to reproduce

Expected behavior

Installation method

Operating system

PHP engine version

Web server

Database engine version

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

Are you using the Nextcloud Server Encryption module?

What user-backends are you using?

Configuration report

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

Additional info

fishfish-fish commented Oct 11, 2022

oktayacikalin commented Jan 13, 2023

szaimen commented Jan 23, 2023

fishfish-fish commented Jan 23, 2023

Snousmoumryk commented Jan 23, 2023

oktayacikalin commented Jan 23, 2023

fishfish-fish commented Jan 25, 2023

fishfish-fish commented Jan 25, 2023

fishfish-fish commented Jan 25, 2023

fishfish-fish commented Feb 10, 2023

fishfish-fish commented Feb 10, 2023 • edited Loading

fishfish-fish commented Feb 10, 2023

fishfish-fish commented Feb 10, 2023

fishfish-fish commented Mar 1, 2023

joshtrichards commented Aug 28, 2023

fishfish-fish commented Aug 29, 2023

fishfish-fish commented Feb 10, 2023 •

edited

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