[Bug]: Undefined array key 0 at /var/www/nextcloud/apps/dav/lib/BulkUpload/BulkUploadPlugin.php#94

[AndyXheli]

⚠️ 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

Not sure what caused the error.

Steps to reproduce

N/A

Expected behavior

N/A

Installation method

Community Manual installation with Archive

Nextcloud Server version

26

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.1

Web server

Apache (supported)

Database engine version

MariaDB

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

Updated to a major version (ex. 22.2.3 to 23.0.1)

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_domains": [
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "26.0.1.1",
        "overwrite.cli.url": "***REMOVED SENSITIVE VALUE***",
        "htaccess.RewriteBase": "\/",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "default_phone_region": "US",
        "default_locale": "en_US",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "skeletondirectory": "",
        "simpleSignUpLink.shown": false,
        "trashbin_retention_obligation": "auto,30",
        "versions_retention_obligation": "auto,1",
        "allow_local_remote_servers": true,
        "preview_max_memory": 1280,
        "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory",
        "twofactor_enforced": "true",
        "twofactor_enforced_groups": [],
        "twofactor_enforced_excluded_groups": [
            "NO2FA"
        ],
        "maintenance": false,
        "theme": "",
        "loglevel": 2,
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "updater.release.channel": "stable",
        "app_install_overwrite": [
            "impersonate"
        ],
        "mail_smtpsecure": "tls",
        "updater.secret": "***REMOVED SENSITIVE VALUE***"
    }
}

List of activated Apps

Enabled:
  - activity: 2.18.0
  - admin_audit: 1.16.0
  - bruteforcesettings: 2.6.0
  - cloud_federation_api: 1.9.0
  - comments: 1.16.0
  - contactsinteraction: 1.7.0
  - dashboard: 7.6.0
  - dav: 1.25.0
  - federatedfilesharing: 1.16.0
  - federation: 1.16.0
  - files: 1.21.1
  - files_downloadactivity: 1.16.0
  - files_external: 1.18.0
  - files_pdfviewer: 2.7.0
  - files_rightclick: 1.5.0
  - files_sharing: 1.18.0
  - files_trashbin: 1.16.0
  - files_versions: 1.19.1
  - firstrunwizard: 2.15.0
  - groupfolders: 14.0.1
  - impersonate: 1.13.0
  - integration_youtube: 0.1.3
  - logreader: 2.11.0
  - lookup_server_connector: 1.14.0
  - nextcloud_announcements: 1.15.0
  - notifications: 2.14.0
  - notify_push: 0.6.2
  - oauth2: 1.14.0
  - onlyoffice: 7.8.0
  - password_policy: 1.16.0
  - photos: 2.2.0
  - privacy: 1.10.0
  - provisioning_api: 1.16.0
  - recommendations: 1.5.0
  - related_resources: 1.1.0-alpha1
  - serverinfo: 1.16.0
  - settings: 1.8.0
  - sharebymail: 1.16.0
  - spreed: 16.0.3
  - support: 1.9.0
  - survey_client: 1.14.0
  - suspicious_login: 4.4.0
  - systemtags: 1.16.0
  - text: 3.7.2
  - theming: 2.1.1
  - twofactor_admin: 4.1.9
  - twofactor_backupcodes: 1.15.0
  - twofactor_email: 2.7.2
  - twofactor_nextcloud_notification: 3.6.0
  - twofactor_reminder: 1.0.0
  - twofactor_totp: 8.0.0-alpha.0
  - updatenotification: 1.16.0
  - user_ldap: 1.16.0
  - user_status: 1.6.0
  - viewer: 1.10.0
  - weather_status: 1.6.0
  - workflowengine: 2.8.0
Disabled:
  - circles: 26.0.0 (installed 23.1.1)
  - encryption: 2.14.0

Nextcloud Signing status

No response

Nextcloud Logs

{"reqId":"nr3yv5BrYtlWsN0xlFs8","level":3,"time":"2023-04-20T15:30:24+00:00","remoteAddr":"10.0.10.154","user":"admin","app":"webdav","method":"POST","url":"/remote.php/dav/bulk","message":"Call to a member function getETag() on null","userAgent":"Mozilla/5.0 (Windows) mirall/3.8.0stable-Win64 (build 20230331) (Nextcloud, windows-10.0.19045 ClientArchitecture: x86_64 OsArchitecture: x86_64)","version":"26.0.1.1","exception":{"Exception":"Error","Message":"Call to a member function getETag() on null","Code":0,"Trace":[{"file":"/var/www/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPost","class":"OCA\\DAV\\BulkUpload\\BulkUploadPlugin","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":366,"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/apps/dav/lib/BulkUpload/BulkUploadPlugin.php","Line":98,"message":"Call to a member function getETag() on null","exception":[],"CustomMessage":"Call to a member function getETag() on null"},"id":"64415b1372e47"}

Additional info

[joshtrichards]

Likely fixed by #43471 and also logging improved to better assess some of these situations in #42001.

[AndyXheli]

Closing for now will reopen if errors comes up again