[Bug]: Log Messages too verbose for standard syslog in non-debug levels

⚠️ 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

Server log messages (found in data/nextcloud.log) are too long for proper syslog support.

Syslog programs will drop some Nextcloud log messages because they exceed the maximum length for the protocol.
Even with the log level set to 2 (Warning) the log messages inherently contain too much data.
Most of this data is trace information about the issue (for Warning and above).

Steps to reproduce

1. Send nextcloud logs to remote syslog server
2. Observe in packet capture syslog reporting message too long error

Expected behavior

Nextcloud logging is entirely too verbose. Log messages should be shortened to include only relevant information.

Trace information should not be included in non-debug log levels.

At most, normal log levels info and above should include a basic summary of the exception.

Installation method

Community Manual installation with Archive

Nextcloud Server version

master

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Nginx

Database engine version

MariaDB

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

Fresh Nextcloud Server install

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

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

Configuration report

{
    "system": {
        "proxy": "apt.mydomain.net:3142",
        "proxyexclude": [
            "nextcloud.mydomain.net"
        ],
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "overwritehost": "nextcloud.mydomain.net",
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "nextcloud.mydomain.net:443"
        ],
        "connectivity_check_domains": [
            "www.nextcloud.com"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "29.0.4.1",
        "overwrite.cli.url": "https:\/\/nextcloud.mydomain.net\/",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "maintenance": false,
        "maintenance_window_start": 1,
        "theme": "",
        "loglevel": 2,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "dbindex": 0,
            "timeout": 1.5
        },
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "default_phone_region": "US",
        "allow_local_remote_servers": true,
        "mail_smtpmode": "sendmail",
        "mail_sendmailmode": "smtp",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "app_install_overwrite": [
            "breezedark"
        ],
        "app.mail.verify-tls-peer": false,
        "memories.exiftool_no_local": true,
        "memories.vod.path": "\/var\/www\/nextcloud\/apps\/memories\/bin-ext\/go-vod-amd64"
    }
}

List of activated Apps

Enabled:
  - admin_audit: 1.19.0
  - bruteforcesettings: 2.9.0
  - calendar: 4.7.13
  - checksum: 1.2.4
  - circles: 29.0.0-dev
  - cloud_federation_api: 1.12.0
  - collectives: 2.13.0
  - comments: 1.19.0
  - contacts: 6.0.0
  - contactsinteraction: 1.10.0
  - dashboard: 7.9.0
  - dav: 1.30.1
  - external: 5.4.0
  - federatedfilesharing: 1.19.0
  - files: 2.1.0
  - files_downloadlimit: 2.0.0
  - files_pdfviewer: 2.10.0
  - files_reminders: 1.2.0
  - files_sharing: 1.21.0
  - files_trashbin: 1.19.0
  - files_versions: 1.22.0
  - logreader: 2.14.0
  - lookup_server_connector: 1.17.0
  - mail: 3.7.5
  - maps: 1.4.0
  - news: 25.0.0-alpha6
  - notes: 4.10.1
  - notifications: 2.17.0
  - oauth2: 1.17.0
  - password_policy: 1.19.0
  - photos: 2.5.0
  - privacy: 1.13.0
  - provisioning_api: 1.19.0
  - related_resources: 1.4.0
  - richdocuments: 8.4.3
  - riotchat: 0.17.6
  - serverinfo: 1.19.0
  - settings: 1.12.0
  - suspicious_login: 7.0.0
  - systemtags: 1.19.0
  - tables: 0.7.4
  - text: 3.10.1
  - theming: 2.4.0
  - theming_customcss: 1.16.0
  - twofactor_backupcodes: 1.18.0
  - updatenotification: 1.19.1
  - user_status: 1.9.0
  - viewer: 2.3.0
  - weather_status: 1.9.0
  - workflowengine: 2.11.0
Disabled:
  - activity: 2.21.1 (installed 2.13.4)
  - encryption: 2.17.0
  - federation: 1.19.0 (installed 1.10.1)
  - files_external: 1.21.0
  - firstrunwizard: 2.18.0 (installed 2.9.0)
  - nextcloud_announcements: 1.18.0 (installed 1.9.0)
  - recommendations: 2.1.0 (installed 0.8.0)
  - sharebymail: 1.19.0 (installed 1.10.0)
  - support: 1.12.0 (installed 1.3.0)
  - survey_client: 1.17.0 (installed 1.8.0)
  - twofactor_totp: 11.0.0-dev
  - user_ldap: 1.20.0

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

{"reqId":"i3dOzZMUq9RduRK8ArrF","level":3,"time":"2024-07-24T22:26:43+00:00","remoteAddr":"166.198.252.132","user":"adminu","app":"no app in context","method":"PUT","url":"/remote.php/dav/files/adminu/.SeedVaultAndroidBackup/1696035578687/.backup.metadata","message":"Exception thrown: OC\\DB\\Exceptions\\DbalException","userAgent":"Mozilla/5.0 (Android) Nextcloud-android/3.29.2","version":"29.0.4.1","exception":{"Exception":"OC\\DB\\Exceptions\\DbalException","Message":"An exception occurred while executing a query: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '92269-1721860004' for key 'files_versions_uniq_index'","Code":1062,"Trace":[{"file":"/var/www/nextcloud/lib/private/DB/QueryBuilder/QueryBuilder.php","line":328,"function":"wrap","class":"OC\\DB\\Exceptions\\DbalException","type":"::"},{"file":"/var/www/nextcloud/lib/public/AppFramework/Db/QBMapper.php","line":137,"function":"executeStatement","class":"OC\\DB\\QueryBuilder\\QueryBuilder","type":"->"},{"file":"/var/www/nextcloud/apps/files_versions/lib/Versions/LegacyVersionsBackend.php","line":249,"function":"insert","class":"OCP\\AppFramework\\Db\\QBMapper","type":"->"},{"file":"/var/www/nextcloud/apps/files_versions/lib/Versions/VersionManager.php","line":139,"function":"createVersionEntity","class":"OCA\\Files_Versions\\Versions\\LegacyVersionsBackend","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Listener/FileEventsListener.php","line":178,"function":"createVersionEntity","class":"OCA\\Files_Versions\\Versions\\VersionManager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Listener/FileEventsListener.php","line":228,"function":"created","class":"OCA\\Files_Versions\\Listener\\FileEventsListener","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Listener/FileEventsListener.php","line":107,"function":"post_write_hook","class":"OCA\\Files_Versions\\Listener\\FileEventsListener","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/ServiceEventListener.php","line":86,"function":"handle","class":"OCA\\Files_Versions\\Listener\\FileEventsListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":230,"function":"__invoke","class":"OC\\EventDispatcher\\ServiceEventListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":59,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":86,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":98,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Node/HookConnector.php","line":102,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/legacy/OC_Hook.php","line":105,"function":"postWrite","class":"OC\\Files\\Node\\HookConnector","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/File.php","line":479,"function":"emit","class":"OC_Hook","type":"::"},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/File.php","line":404,"function":"emitPostHooks","class":"OCA\\DAV\\Connector\\Sabre\\File","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1137,"function":"put","class":"OCA\\DAV\\Connector\\Sabre\\File","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":492,"function":"updateFile","class":"Sabre\\DAV\\Server","type":"->","args":["*** 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'files_versions_uniq_index'","Code":"23000","Trace":[{"file":"/var/www/nextcloud/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php","line":130,"function":"execute","class":"PDOStatement","type":"->"},{"file":"/var/www/nextcloud/3rdparty/doctrine/dbal/src/Connection.php","line":1207,"function":"execute","class":"Doctrine\\DBAL\\Driver\\PDO\\Statement","type":"->"},{"file":"/var/www/nextcloud/3rdparty/doctrine/dbal/src/Connections/PrimaryReadReplicaConnection.php","line":292,"function":"executeStatement","class":"Doctrine\\DBAL\\Connection","type":"->"},{"file":"/var/www/nextcloud/lib/private/DB/Connection.php","line":373,"function":"executeStatement","class":"Doctrine\\DBAL\\Connections\\PrimaryReadReplicaConnection","type":"->"},{"file":"/var/www/nextcloud/3rdparty/doctrine/dbal/src/Query/QueryBuilder.php","line":393,"function":"executeStatement","class":"OC\\DB\\Connection","type":"->"},{"file":"/var/www/nextcloud/lib/private/DB/QueryBuilder/QueryBuilder.php","line":280,"function":"execute","class":"Doctrine\\DBAL\\Query\\QueryBuilder","type":"->"},{"file":"/var/www/nextcloud/lib/private/DB/QueryBuilder/QueryBuilder.php","line":326,"function":"execute","class":"OC\\DB\\QueryBuilder\\QueryBuilder","type":"->"},{"file":"/var/www/nextcloud/lib/public/AppFramework/Db/QBMapper.php","line":137,"function":"executeStatement","class":"OC\\DB\\QueryBuilder\\QueryBuilder","type":"->"},{"file":"/var/www/nextcloud/apps/files_versions/lib/Versions/LegacyVersionsBackend.php","line":249,"function":"insert","class":"OCP\\AppFramework\\Db\\QBMapper","type":"->"},{"file":"/var/www/nextcloud/apps/files_versions/lib/Versions/VersionManager.php","line":139,"function":"createVersionEntity","class":"OCA\\Files_Versions\\Versions\\LegacyVersionsBackend","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Listener/FileEventsListener.php","line":178,"function":"createVersionEntity","class":"OCA\\Files_Versions\\Versions\\VersionManager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Listener/FileEventsListener.php","line":228,"function":"created","class":"OCA\\Files_Versions\\Listener\\FileEventsListener","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/files_versions/lib/Listener/FileEventsListener.php","line":107,"function":"post_write_hook","class":"OCA\\Files_Versions\\Listener\\FileEventsListener","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/ServiceEventListener.php","line":86,"function":"handle","class":"OCA\\Files_Versions\\Listener\\FileEventsListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":230,"function":"__invoke","class":"OC\\EventDispatcher\\ServiceEventListener","type":"->"},{"file":"/var/www/nextcloud/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":59,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":86,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/EventDispatcher/EventDispatcher.php","line":98,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Files/Node/HookConnector.php","line":102,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/legacy/OC_Hook.php","line":105,"function":"postWrite","class":"OC\\Files\\Node\\HookConnector","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/File.php","line":479,"function":"emit","class":"OC_Hook","type":"::"},{"file":"/var/www/nextcloud/apps/dav/lib/Connector/Sabre/File.php","line":404,"function":"emitPostHooks","class":"OCA\\DAV\\Connector\\Sabre\\File","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1137,"function":"put","class":"OCA\\DAV\\Connector\\Sabre\\File","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":492,"function":"updateFile","class":"Sabre\\DAV\\Server","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPut","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":472,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/lib/Server.php","line":383,"function":"exec","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/var/www/nextcloud/remote.php","line":172,"args":["/var/www/nextcloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/var/www/nextcloud/3rdparty/doctrine/dbal/src/Driver/PDO/Statement.php","Line":130}}},"CustomMessage":"Exception thrown: OC\\DB\\Exceptions\\DbalException"}}

Additional info

Sample super long log message above. Most of the clutter is just the issue trace.

Too long message from packet capture:

Start with the logging path that produces data/nextcloud.log and reproduce the report by sending logs to a remote syslog server while observing packet-capture message-length errors. Determine how log level 2 currently includes exception trace data. Done means non-debug messages fit syslog limits while retaining relevant summaries and omitting trace information at the stated levels.