[Bug]: Nextcloud becomes unresponsive after app updat due to Apache process crashing

[theking2]

⚠️ 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

Doing a routine update results in unavailability due to Apache childs crashing:

83.97.85.45 - - [01/Jun/2026:19:53:04 +0200] "POST /login/confirm HTTP/1.1" 200 846 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
83.97.85.45 - - [01/Jun/2026:19:53:04 +0200] "GET /settings/apps/update/cookbook HTTP/1.1" 200 750 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
83.97.85.45 - - [01/Jun/2026:19:53:06 +0200] "GET /ocs/v2.php/core/navigation/apps?format=json HTTP/1.1" 200 1225 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
[Mon Jun 01 19:53:18.904054 2026] [core:notice] [pid 1:tid 1] AH00052: child pid 66 exit signal Segmentation fault (11)
[Mon Jun 01 19:53:18.905159 2026] [core:notice] [pid 1:tid 1] AH00052: child pid 68 exit signal Segmentation fault (11)

No errors are logged in the Nextcloud.log

The Basics

• Nextcloud Server version:
  • Nextcloud 33.0.4
• Operating system and version:
  • #1 SMP PREEMPT Debian 1:6.12.87-1+rpt1~bookworm (2026-05-12)
• Web server and version:
  • Server version: Apache/2.4.67 (Debian)
• Reverse proxy and version:
  • nginx version: openresty/1.27.1.2
• PHP version:
  • PHP 8.4.21 (cli) (built: May 19 2026 23:10:30) (NTS)
• Is this the first time you've seen this error? (Yes / No):
  • yes
• When did this problem seem to first start?
  • recently
• Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
  • OMV Container
• Are you using CloudfIare, mod_security, or similar? (Yes / No)
  • No

Expected behavior

Update commences normaly

Nextcloud Server version

33

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.4

Web server

Apache (supported)

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 Enabled

What user-backends are you using?

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

Configuration report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "version": "33.0.4.1",
        "loglevel": 4,
        "log_rotate_size": 262144,
        "maintenance": false,
        "maintenance_window_start": 3,
        "default_locale": "DE_CH",
        "default_phone_region": "CH",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "upgrade.disable-web": true,
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "mysql.utf8mb4": true,
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "htaccess.RewriteBase": "\/",
        "trusted_domains": [
            "srv-nas-pi.kingma:8080",
            "office.kingma.ch",
            "office.king.ma",
            "cloud.kingma.ch",
            "cloud.king.ma"
        ],
        "overwrite.cli.url": "https:\/\/office.kingma.ch",
        "overwriteprotocol": "https",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "mail_smpttimeout": 30,
        "installed": true,
        "mail_smtpauth": true,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpsecure": "ssl",
        "app_install_overwrite": [],
        "serverid": 9
    }
}

List of activated Apps

> Enabled:
>   - activity: 6.0.0
>   - admin_audit: 1.23.0
>   - bookmarks: 16.1.4
>   - brewmemo: 0.6.0
>   - bruteforcesettings: 6.0.0
>   - calendar: 6.4.2
>   - camerarawpreviews: 0.9.0
>   - circles: 33.0.0
>   - cloud_federation_api: 1.17.0
>   - comments: 1.23.0
>   - contacts: 8.5.1
>   - contactsinteraction: 1.14.1
>   - cookbook: 0.11.7
>   - dashboard: 7.13.0
>   - dav: 1.36.0
>   - encryption: 2.21.0
>   - end_to_end_encryption: 2.1.1
>   - federatedfilesharing: 1.23.0
>   - federation: 1.23.0
>   - files: 2.5.0
>   - files_downloadlimit: 5.1.0
>   - files_external: 1.25.1
>   - files_pdfviewer: 6.0.0
>   - files_reminders: 1.6.0
>   - files_sharing: 1.25.2
>   - files_trashbin: 1.23.0
>   - files_versions: 1.26.0
>   - firstrunwizard: 6.0.0
>   - fulltextsearch: 33.0.0
>   - groupfolders: 21.0.7
>   - logreader: 6.0.0
>   - lookup_server_connector: 1.21.0
>   - nextcloud_announcements: 5.0.0
>   - notes: 5.0.0
>   - notifications: 6.0.0
>   - oauth2: 1.21.0
>   - onlyoffice: 10.0.0
>   - password_policy: 5.0.0
>   - photos: 6.0.0
>   - previewgenerator: 5.13.0
>   - privacy: 5.0.0
>   - profile: 1.2.0
>   - provisioning_api: 1.23.0
>   - recommendations: 6.0.0
>   - related_resources: 4.0.0
>   - serverinfo: 5.0.0
>   - settings: 1.16.0
>   - sharebymail: 1.23.0
>   - support: 5.0.0
>   - survey_client: 5.0.0
>   - suspicious_login: 11.0.0
>   - systemtags: 1.23.0
>   - tables: 2.1.1
>   - text: 7.0.1
>   - theming: 2.8.0
>   - twofactor_backupcodes: 1.22.0
>   - twofactor_nextcloud_notification: 7.0.0
>   - twofactor_totp: 15.0.0
>   - updatenotification: 1.23.0
>   - uppush: 2.4.0
>   - user_status: 1.13.0
>   - viewer: 6.0.0
>   - weather_status: 1.13.0
>   - webhook_listeners: 1.5.0
>   - workflowengine: 2.15.0
> Disabled:
>   - app_api: 33.0.0 (installed 32.0.0)
>   - integration_dropbox: 5.0.0 (installed 5.0.0)
>   - user_ldap: 1.24.0 (installed 1.22.0)

Nextcloud Signing status

Nextcloud Logs

empty

Additional info

occ_support-report.txt

[theking2]

I just added the Sentry app:

83.97.85.45 - - [01/Jun/2026:20:51:59 +0200] "GET /settings/apps/list HTTP/1.1" 200 1531138 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
83.97.85.45 - johannes [01/Jun/2026:20:52:17 +0200] "PROPFIND /remote.php/dav/files/johannes/ HTTP/1.1" 207 985 "-" "Mozilla/5.0 (Linux) mirall/33.0.5 (build 39649) (Nextcloud, fedora-7.0.10-201.fc44.x86_64 ClientArchitecture: x86_64 OsArchitecture: x86_64)"
83.97.85.45 - king_admin [01/Jun/2026:20:52:17 +0200] "POST /settings/apps/enable HTTP/1.1" 200 854 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
[Mon Jun 01 20:52:25.706436 2026] [core:notice] [pid 1:tid 1] AH00052: child pid 62 exit signal Segmentation fault (11)
[Mon Jun 01 20:52:32.713582 2026] [core:notice] [pid 1:tid 1] AH00052: child pid 157 exit signal Segmentation fault (11)
[Mon Jun 01 20:52:32.713658 2026] [core:notice] [pid 1:tid 1] AH00052: child pid 170 exit signal Segmentation fault (11)

[theking2]

with a lower loglevel:

extcloud        | 83.97.85.45 - king_admin [01/Jun/2026:21:02:15 +0200] "POST /settings/apps/enable HTTP/1.1" 200 854 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
nextcloud        | 83.97.85.45 - - [01/Jun/2026:21:02:16 +0200] "GET /apps/files/ HTTP/1.1" 200 17248 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
nextcloud        | 83.97.85.45 - - [01/Jun/2026:21:02:16 +0200] "GET /ocs/v2.php/core/navigation/apps?format=json HTTP/1.1" 200 1225 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
nextcloud        | 83.97.85.45 - johannes [01/Jun/2026:21:02:17 +0200] "PROPFIND /remote.php/dav/files/johannes/ HTTP/1.1" 207 985 "-" "Mozilla/5.0 (Linux) mirall/33.0.5 (build 39649) (Nextcloud, fedora-7.0.10-201.fc44.x86_64 ClientArchitecture: x86_64 OsArchitecture: x86_64)"
nextcloud        | 83.97.85.45 - - [01/Jun/2026:21:02:44 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications HTTP/1.1" 304 695 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
nextcloud        | 83.97.85.45 - johannes [01/Jun/2026:21:02:47 +0200] "PROPFIND /remote.php/dav/files/johannes/ HTTP/1.1" 207 985 "-" "Mozilla/5.0 (Linux) mirall/33.0.5 (build 39649) (Nextcloud, fedora-7.0.10-201.fc44.x86_64 ClientArchitecture: x86_64 OsArchitecture: x86_64)"
nextcloud        | 83.97.85.45 - johannes [01/Jun/2026:21:02:47 +0200] "GET /ocs/v2.php/apps/notifications/api/v2/notifications?format=json HTTP/1.1" 304 715 "-" "Mozilla/5.0 (Linux) mirall/33.0.5 (build 39649) (Nextcloud, fedora-7.0.10-201.fc44.x86_64 ClientArchitecture: x86_64 OsArchitecture: x86_64)"
nextcloud        | 83.97.85.45 - johannes [01/Jun/2026:21:02:47 +0200] "GET /ocs/v2.php/apps/user_status/api/v1/user_status?format=json HTTP/1.1" 200 873 "-" "Mozilla/5.0 (Linux) mirall/33.0.5 (build 39649) (Nextcloud, fedora-7.0.10-201.fc44.x86_64 ClientArchitecture: x86_64 OsArchitecture: x86_64)"
nextcloud        | 83.97.85.45 - - [01/Jun/2026:21:02:47 +0200] "PUT /ocs/v2.php/apps/user_status/api/v1/heartbeat?format=json HTTP/1.1" 204 620 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
nextcloud        | 83.97.85.45 - king_admin [01/Jun/2026:21:02:52 +0200] "POST /settings/apps/enable HTTP/1.1" 200 854 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:151.0) Gecko/20100101 Firefox/151.0"
nextcloud-db     | 2026-06-01 19:02:54 160 [Warning] Aborted connection 160 to db: 'nextcloud' user: 'nextcloud' host: '172.19.0.4' (Got an error reading communication packets)
nextcloud        | [Mon Jun 01 21:02:55.275192 2026] [core:notice] [pid 1:tid 1] AH00052: child pid 65 exit signal Segmentation fault (11)
nextcloud        | [Mon Jun 01 21:02:55.275261 2026] [core:notice] [pid 1:tid 1] AH00052: child pid 67 exit signal Segmentation fault (11)
nextcloud        | [Mon Jun 01 21:02:55.275298 2026] [core:notice] [pid 1:tid 1] AH00052: child pid 68 exit signal Segmentation fault (11)
nextcloud        | [Mon Jun 01 21:03:04.280565 2026] [core:notice] [pid 1:tid 1] AH00052: child pid 70 exit signal Segmentation fault (11)

[theking2]

in the compose file changed

command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW

to

command: >
 --transaction-isolation=READ-COMMITTED
 --binlog-format=ROW
 --max_allowed_packet=32505856

same result.up logging

{"reqId":"FHTW3oYVwU4IrGbhkBTQ","level":3,"time":"2026-06-01T19:07:08+00:00","remoteAddr":"","user":"--","app":"core","method":"","url":"--","scriptName":"/var/www/html/cron.php","message":"Error while running background job OCA\\DAV\\BackgroundJob\\EventReminderJob (id: 22, arguments: null)","userAgent":"--","version":"33.0.4.1","occ_command":["/var/www/html/cron.php"],"exception":{"Exception":"Error","Message":"Call to a member function getAppValueString() on null","Code":0,"Trace":[{"file":"/var/www/html/apps/notifications/lib/Push.php","line":404,"function":"encryptAndSignDelete","class":"OCA\\Notifications\\Push","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/apps/notifications/lib/Push.php","line":161,"function":"pushDeleteToDevice","class":"OCA\\Notifications\\Push","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/apps/notifications/lib/App.php","line":66,"function":"flushPayloads","class":"OCA\\Notifications\\Push","type":"->","args":[]},{"file":"/var/www/html/lib/private/Notification/Manager.php","line":400,"function":"markProcessed","class":"OCA\\Notifications\\App","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/lib/private/Notification/Manager.php","line":353,"function":"markProcessed","class":"OC\\Notification\\Manager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/apps/notifications/lib/Push.php","line":257,"function":"prepare","class":"OC\\Notification\\Manager","type":"->","args":["*** sensitive parameters replaced ***","nl"]},{"file":"/var/www/html/apps/notifications/lib/App.php","line":37,"function":"pushToDevice","class":"OCA\\Notifications\\Push","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/lib/private/Notification/Manager.php","line":313,"function":"notify","class":"OCA\\Notifications\\App","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/apps/dav/lib/CalDAV/Reminder/NotificationProvider/PushProvider.php","line":83,"function":"notify","class":"OC\\Notification\\Manager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/apps/dav/lib/CalDAV/Reminder/ReminderService.php","line":147,"function":"send","class":"OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\PushProvider","type":"->","args":[{"__class__":"Sabre\\VObject\\Component\\VEvent","parent":{"__class__":"Sabre\\VObject\\Component\\VCalendar","parent":null,"name":"VCALENDAR"},"name":"VEVENT"},"Personal",["johannes@king.ma"],[{"__class__":"OC\\User\\User"}]]},{"file":"/var/www/html/apps/dav/lib/BackgroundJob/EventReminderJob.php","line":47,"function":"processReminders","class":"OCA\\DAV\\CalDAV\\Reminder\\ReminderService","type":"->","args":[]},{"file":"/var/www/html/lib/public/BackgroundJob/Job.php","line":50,"function":"run","class":"OCA\\DAV\\BackgroundJob\\EventReminderJob","type":"->","args":[null]},{"file":"/var/www/html/lib/public/BackgroundJob/TimedJob.php","line":85,"function":"start","class":"OCP\\BackgroundJob\\Job","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"}]},{"file":"/var/www/html/core/Service/CronService.php","line":176,"function":"start","class":"OCP\\BackgroundJob\\TimedJob","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"}]},{"file":"/var/www/html/core/Service/CronService.php","line":98,"function":"runCli","class":"OC\\Core\\Service\\CronService","type":"->","args":["cron",null]},{"file":"/var/www/html/cron.php","line":52,"function":"run","class":"OC\\Core\\Service\\CronService","type":"->","args":[null]}],"File":"/var/www/html/apps/notifications/lib/Push.php","Line":698,"message":"Error while running background job OCA\\DAV\\BackgroundJob\\EventReminderJob (id: 22, arguments: null)","exception":"{\"class\":\"Error\",\"message\":\"Call to a member function getAppValueString() on null\",\"code\":0,\"file\":\"/var/www/html/apps/notifications/lib/Push.php:698\",\"trace\":\"#0 /var/www/html/apps/notifications/lib/Push.php(404): OCA\\Notifications\\Push->encryptAndSignDelete(Object(OC\\Security\\IdentityProof\\Key), Array, Array)\\n#1 /var/www/html/apps/notifications/lib/Push.php(161): OCA\\Notifications\\Push->pushDeleteToDevice('johannes', Array, 'files')\\n#2 /var/www/html/apps/notifications/lib/App.php(66): OCA\\Notifications\\Push->flushPayloads()\\n#3 /var/www/html/lib/private/Notification/Manager.php(400): OCA\\Notifications\\App->markProcessed(Object(OC\\Notification\\Notification))\\n#4 /var/www/html/lib/private/Notification/Manager.php(353): OC\\Notification\\Manager->markProcessed(Object(OC\\Notification\\Notification))\\n#5 /var/www/html/apps/notifications/lib/Push.php(257): OC\\Notification\\Manager->prepare(Object(OC\\Notification\\Notification), 'nl')\\n#6 /var/www/html/apps/notifications/lib/App.php(37): OCA\\Notifications\\Push->pushToDevice(462, Object(OC\\Notification\\Notification))\\n#7 /var/www/html/lib/private/Notification/Manager.php(313): OCA\\Notifications\\App->notify(Object(OC\\Notification\\Notification))\\n#8 /var/www/html/apps/dav/lib/CalDAV/Reminder/NotificationProvider/PushProvider.php(83): OC\\Notification\\Manager->notify(Object(OC\\Notification\\Notification))\\n#9 /var/www/html/apps/dav/lib/CalDAV/Reminder/ReminderService.php(147): OCA\\DAV\\CalDAV\\Reminder\\NotificationProvider\\PushProvider->send(Object(Sabre\\VObject\\Component\\VEvent), 'Personal', Array, Array)\\n#10 /var/www/html/apps/dav/lib/BackgroundJob/EventReminderJob.php(47): OCA\\DAV\\CalDAV\\Reminder\\ReminderService->processReminders()\\n#11 /var/www/html/lib/public/BackgroundJob/Job.php(50): OCA\\DAV\\BackgroundJob\\EventReminderJob->run(NULL)\\n#12 /var/www/html/lib/public/BackgroundJob/TimedJob.php(85): OCP\\BackgroundJob\\Job->start(Object(OC\\BackgroundJob\\JobList))\\n#13 /var/www/html/core/Service/CronService.php(176): OCP\\BackgroundJob\\TimedJob->start(Object(OC\\BackgroundJob\\JobList))\\n#14 /var/www/html/core/Service/CronService.php(98): OC\\Core\\Service\\CronService->runCli('cron', NULL)\\n#15 /var/www/html/cron.php(52): OC\\Core\\Service\\CronService->run(NULL)\\n#16 {main}\"}","CustomMessage":"Error while running background job OCA\\DAV\\BackgroundJob\\EventReminderJob (id: 22, arguments: null)"},"id":"6a1de0687eb69"}