[Bug]: Array to string conversion at /app/www/public/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php#48
Open
Nobody has claimed this yet.
0. Needs triage
33-feedback
bug
high
- Dominant language
- PHP
- Stars
- 36.9k
- Forks
- 5.2k
- Avg merge
- 2d 3h
- Merged PRs (30d)
- 713
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
Calling the general administration ui produces this warning in the log Array to string conversion at /app/www/public/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php#48 and leaves the docker container at 100% cpu utilization
Steps to reproduce
- Call the server-wide administration overview.
- Happens now and then - not reproducable
Expected behavior
Normal CPU util
Nextcloud Server version
33
Operating system
Other
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?
None
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": {
"memcache.local": "\\OC\\Memcache\\APCu",
"datadirectory": "***REMOVED SENSITIVE VALUE***",
"instanceid": "***REMOVED SENSITIVE VALUE***",
"passwordsalt": "***REMOVED SENSITIVE VALUE***",
"secret": "***REMOVED SENSITIVE VALUE***",
"trusted_domains": [
"192.168.1.204",
"nextcloud.walzer.me"
],
"dbtype": "mysql",
"version": "33.0.0.16",
"trusted_proxies": "***REMOVED SENSITIVE VALUE***",
"overwrite.cli.url": "https:\/\/nextcloud.walzer.me",
"overwritehost": "nextcloud.walzer.me",
"overwriteprotocol": "https",
"dbname": "***REMOVED SENSITIVE VALUE***",
"dbhost": "***REMOVED SENSITIVE VALUE***",
"dbport": "",
"dbtableprefix": "oc_",
"mysql.utf8mb4": true,
"dbuser": "***REMOVED SENSITIVE VALUE***",
"dbpassword": "***REMOVED SENSITIVE VALUE***",
"installed": true,
"maintenance": false,
"maintenance_window_start": 9,
"theme": "",
"loglevel": 2,
"updater.release.channel": "stable",
"mail_from_address": "***REMOVED SENSITIVE VALUE***",
"mail_smtpmode": "smtp",
"mail_sendmailmode": "smtp",
"mail_domain": "***REMOVED SENSITIVE VALUE***",
"mail_smtpauthtype": "LOGIN",
"mail_smtpauth": 1,
"mail_smtphost": "***REMOVED SENSITIVE VALUE***",
"mail_smtpport": "587",
"mail_smtpname": "***REMOVED SENSITIVE VALUE***",
"mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
"default_language": "de",
"default_locale": "de_AT",
"default_phone_region": "AT",
"app_install_overwrite": {
"0": "files_mindmap",
"1": "richdocuments",
"3": "files_trackdownloads",
"4": "files_antivirus",
"5": "fulltextsearch",
"6": "fulltextsearch_elasticsearch",
"7": "files_fulltextsearch",
"8": "geoblocker"
},
"0": {
"preview_max_x": "2048",
"preview_max_y": "2048",
"jpeg_quality": "60"
},
"filelocking.enabled": "true",
"memcache.locking": "\\OC\\Memcache\\APCu",
"upgrade.disable-web": true,
"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"
]
}
}
List of activated Apps
Enabled:
- activity: 6.0.0-dev.0
- app_api: 33.0.0
- bruteforcesettings: 6.0.0-dev.0
- circles: 33.0.0
- cloud_federation_api: 1.17.0
- comments: 1.23.0
- contactsinteraction: 1.14.1
- dashboard: 7.13.0
- dav: 1.36.0
- federatedfilesharing: 1.23.0
- federation: 1.23.0
- files: 2.5.0
- files_antivirus: 6.1.0
- files_automatedtagging: 4.0.0
- files_downloadlimit: 5.1.0-dev.0
- files_external: 1.25.1
- files_fulltextsearch: 33.0.0
- files_pdfviewer: 6.0.0-dev.0
- files_reminders: 1.6.0
- files_retention: 4.0.0
- files_sharing: 1.25.2
- files_trashbin: 1.23.0
- files_versions: 1.26.0
- firstrunwizard: 6.0.0-dev.0
- fulltextsearch: 33.0.0
- fulltextsearch_elasticsearch: 33.0.0
- geoblocker: 0.5.19
- groupfolders: 21.0.6
- logreader: 6.0.0
- lookup_server_connector: 1.21.0
- nextcloud_announcements: 5.0.0
- notes: 4.13.0
- notifications: 6.0.0
- oauth2: 1.21.0
- password_policy: 5.0.0-dev.0
- photos: 6.0.0-dev.0
- previewgenerator: 5.13.0
- privacy: 5.0.0-dev.0
- profile: 1.2.0
- provisioning_api: 1.23.0
- recognize: 11.0.1
- recommendations: 6.0.0-dev.0
- related_resources: 4.0.0-dev.0
- richdocuments: 10.1.0
- serverinfo: 5.0.0-dev.0
- settings: 1.16.0
- sharebymail: 1.23.0
- support: 5.0.0
- survey_client: 5.0.0-dev.0
- suspicious_login: 11.0.0-dev.0
- systemtags: 1.23.0
- text: 7.0.0-dev.3
- theming: 2.8.0
- twofactor_backupcodes: 1.22.0
- twofactor_totp: 15.0.0-dev.0
- user_status: 1.13.0
- viewer: 6.0.0-dev.0
- weather_status: 1.13.0
- webhook_listeners: 1.5.0
- whiteboard: 1.5.7
- workflowengine: 2.15.0
Disabled:
- admin_audit: 1.23.0
- encryption: 2.21.0
- extract: 1.3.6 (installed 1.3.6)
- files_rightclick: 1.6.0 (installed 1.6.0)
- ransomware_protection: 1.14.0 (installed 1.14.0)
- twofactor_nextcloud_notification: 7.0.0
- updatenotification: 1.23.0 (installed 1.17.0)
- user_ldap: 1.24.0
- user_usage_report: 4.0.0 (installed 4.0.0)
Nextcloud Signing status
No errors have been found.
Nextcloud Logs
Warnung
PHP
Array to string conversion at /app/www/public/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php#48
05.03.2026, 05:31:52
Warnung
PHP
Array to string conversion at /app/www/public/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php#48
05.03.2026, 05:31:52
Fehler
PHP
Maximum execution time of 3600 seconds exceeded at /app/www/public/lib/private/AppFramework/Middleware/CompressionMiddleware.php#66
05.03.2026, 04:52:44
Fehler
PHP
Maximum execution time of 3600 seconds exceeded at /app/www/public/lib/private/AppFramework/Middleware/CompressionMiddleware.php#66
05.03.2026, 04:52:44
Fehler
PHP
Maximum execution time of 3600 seconds exceeded at /app/www/public/lib/private/AppFramework/Middleware/CompressionMiddleware.php#66
05.03.2026, 04:52:44
Fehler
PHP
Maximum execution time of 3600 seconds exceeded at /app/www/public/lib/private/AppFramework/Middleware/CompressionMiddleware.php#66
05.03.2026, 04:52:44
Fehler
PHP
Maximum execution time of 3600 seconds exceeded at /app/www/public/lib/private/AppFramework/Middleware/CompressionMiddleware.php#66
Additional info
No response
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with 3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php at line 48, then trace the queries and parameters triggered by the server-wide administration overview. Use the reported PHP warnings and maximum-execution-time errors to identify the intermittent path; done means the warning and runaway CPU behavior no longer occur during the overview request.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- docker, mariadb, nginx, php
- Domain
- backend, database, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 28/100