Undefined offset: 1 at /apps/files_external/lib/Lib/Storage/SMB.php#226

[anduz]

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Steps to reproduce

1. Upgrade to NC 21.... and see logs

Expected behaviour

No errors, files:scan working for external files (SMB mounts)

Actual behaviour

Starting scan for user 1 out of 1 (user)
Exception during scan: Undefined offset: 1
#0 /var/www/owncloud/apps/files_external/lib/Lib/Storage/SMB.php(222): OCA\Files\Command\Scan->exceptionErrorHandler()
#1 /var/www/owncloud/apps/files_external/lib/Lib/Storage/SMB.php(254): OCA\Files_External\Lib\Storage\SMB->getACL()
#2 /var/www/owncloud/apps/files_external/lib/Lib/Storage/SMB.php(623): OCA\Files_External\Lib\Storage\SMB->getFolderContents()
#3 /var/www/owncloud/lib/private/Files/Storage/Wrapper/Encryption.php(205): OCA\Files_External\Lib\Storage\SMB->getDirectoryContent()
#4 [internal function]: OC\Files\Storage\Wrapper\Encryption->getDirectoryContent()
#5 /var/www/owncloud/lib/private/Files/Cache/Scanner.php(409): iterator_to_array()
#6 /var/www/owncloud/lib/private/Files/Cache/Scanner.php(389): OC\Files\Cache\Scanner->handleChildren()
#7 /var/www/owncloud/lib/private/Files/Cache/Scanner.php(341): OC\Files\Cache\Scanner->scanChildren()
#8 /var/www/owncloud/lib/private/Files/Utils/Scanner.php(260): OC\Files\Cache\Scanner->scan()
#9 /var/www/owncloud/apps/files/lib/Command/Scan.php(158): OC\Files\Utils\Scanner->scan()
#10 /var/www/owncloud/apps/files/lib/Command/Scan.php(214): OCA\Files\Command\Scan->scanFiles()
#11 /var/www/owncloud/3rdparty/symfony/console/Command/Command.php(255): OCA\Files\Command\Scan->execute()
#12 /var/www/owncloud/core/Command/Base.php(169): Symfony\Component\Console\Command\Command->run()
#13 /var/www/owncloud/3rdparty/symfony/console/Application.php(1009): OC\Core\Command\Base->run()
#14 /var/www/owncloud/3rdparty/symfony/console/Application.php(273): Symfony\Component\Console\Application->doRunCommand()
#15 /var/www/owncloud/3rdparty/symfony/console/Application.php(149): Symfony\Component\Console\Application->doRun()
#16 /var/www/owncloud/lib/private/Console/Application.php(215): Symfony\Component\Console\Application->run()
#17 /var/www/owncloud/console.php(100): OC\Console\Application->run()
#18 /var/www/owncloud/occ(11): require_once('/var/www/ownclo...')
#19 {main}

Server configuration

Operating system:
Ubuntu 20 (upgraded)

Web server:
apache2

Database:
Art: mysql
Version: 8.0.25

PHP version:
Version: 7.4.20

Nextcloud version: (see Nextcloud admin page)
Nextcloud 21.0.3

Updated from an older Nextcloud/ownCloud or fresh install:
Updated

Where did you install Nextcloud from:
First was an image, then updated throu various channels and updater app

Signing status:

Signing status

Login as admin user into your Nextcloud and access 
http://example.com/index.php/settings/integrity/failed 
paste the results here.

No errors have been found.

List of activated apps:

App list

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your Nextcloud installation folder

Enabled:

• accessibility: 1.7.0
• activity: 2.14.3
• admin_audit: 1.11.0
• bruteforcesettings: 2.2.0
• calendar: 2.3.0
• cloud_federation_api: 1.4.0
• comments: 1.11.0
• contactsinteraction: 1.2.0
• dashboard: 7.1.0
• dav: 1.17.1
• encryption: 2.9.0
• federatedfilesharing: 1.11.0
• federation: 1.11.0
• files: 1.16.0
• files_external: 1.12.0
• files_fulltextsearch: 21.0.2
• files_linkeditor: 1.1.5
• files_pdfviewer: 2.1.0
• files_rightclick: 1.0.0
• files_sharing: 1.13.1
• files_trashbin: 1.11.0
• files_versions: 1.14.0
• files_videoplayer: 1.10.0
• firstrunwizard: 2.10.0
• fulltextsearch: 21.0.1
• fulltextsearch_elasticsearch: 21.0.1
• logreader: 2.6.0
• lookup_server_connector: 1.9.0
• maps: 0.1.8
• nextcloud_announcements: 1.10.0
• notifications: 2.9.0
• oauth2: 1.9.0
• onlyoffice: 7.0.2
• password_policy: 1.11.0
• photos: 1.3.0
• previewgenerator: 3.1.1
• privacy: 1.5.0
• provisioning_api: 1.11.0
• recommendations: 1.0.0
• serverinfo: 1.11.0
• settings: 1.3.0
• sharebymail: 1.11.0
• sharingpath: 0.3.0
• support: 1.4.0
• survey_client: 1.9.0
• systemtags: 1.11.0
• tasks: 0.13.6
• theming: 1.12.0
• twofactor_backupcodes: 1.10.0
• twofactor_totp: 6.1.0
• updatenotification: 1.11.0
• user_status: 1.1.1
• viewer: 1.5.0
• weather_status: 1.1.0
• workflowengine: 2.3.0
  Disabled:
• end_to_end_encryption
• files_fulltextsearch_tesseract
• nextbackup
• sharerenamer
• spreed
• text
• twofactor_admin
• twofactor_gateway
• user_ldap

Nextcloud configuration:

Config report

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud installation folder

{
    "system": {
        "memcache.local": "\\OC\\Memcache\\APCu",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost",
            "192.168.162.16",
            "192.168.162.15",
            "188.11.219.37",
            "office.instalbau.it"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "https:\/\/office.instalbau.it\/",
        "dbtype": "mysql",
        "version": "21.0.3.1",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "logtimezone": "Europe\/Berlin",
        "loglevel": 0,
        "logfile": "\/var\/www\/owncloud\/data\/owncloud.log",
        "installed": true,
        "theme": "",
        "maintenance": false,
        "trashbin_retention_obligation": "auto",
        "preview_libreoffice_path": "\/usr\/bin\/libreoffice",
        "updatechecker": false,
        "htaccess.RewriteBase": "\/",
        "singleuser": true,
        "filelocking.enabled": true,
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 0,
            "dbindex": 0,
            "password": "***REMOVED SENSITIVE VALUE***"
        },
        "data-fingerprint": "412330b87d1afa463ac9fb11054275d0",
        "mail_sendmailmode": "smtp",
        "mysql.utf8mb4": true,
        "preview_max_x": "2048",
        "preview_max_y": "2048",
        "jpeg_quality": "60",
        "updater.secret": "***REMOVED SENSITIVE VALUE***",
        "default_phone_region": "IT"
    }
}

or 

Insert your config.php content here. 
Make sure to remove all sensitive content such as passwords. (e.g. database password, passwordsalt, secret, smtp password, …)

Are you using external storage, if yes which one: local/smb/sftp/...
smb

Are you using encryption: yes/no
no

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...
no

Client configuration

Browser:

Operating system:

Logs

Web server error log

Web server error log

Insert your webserver log here
{"reqId":"nstK8K9SLLIPIWaol2kc","level":3,"time":"2021-07-05T13:37:09+02:00","remoteAddr":"192.168.162.1","user":"roman","app":"PHP","method":"PROPFIND","url":"/remote.php/dav/files/roman/Firmendaten","message":{"Exception":"Error","Message":"Undefined offset: 1 at /var/www/owncloud/apps/files_external/lib/Lib/Storage/SMB.php#226","Code":0,"Trace":[{"file":"/var/www/owncloud/apps/files_external/lib/Lib/Storage/SMB.php","line":226,"function":"onError","class":"OC\\Log\\ErrorHandler","type":"::"},{"file":"/var/www/owncloud/apps/files_external/lib/Lib/Storage/SMB.php","line":258,"function":"getACL","class":"OCA\\Files_External\\Lib\\Storage\\SMB","type":"->"},{"file":"/var/www/owncloud/apps/files_external/lib/Lib/Storage/SMB.php","line":629,"function":"getFolderContents","class":"OCA\\Files_External\\Lib\\Storage\\SMB","type":"->"},{"file":"/var/www/owncloud/lib/private/Files/Storage/Wrapper/Encryption.php","line":205,"function":"getDirectoryContent","class":"OCA\\Files_External\\Lib\\Storage\\SMB","type":"->"},{"function":"getDirectoryContent","class":"OC\\Files\\Storage\\Wrapper\\Encryption","type":"->"},{"file":"/var/www/owncloud/lib/private/Files/Cache/Scanner.php","line":409,"function":"iterator_to_array"},{"file":"/var/www/owncloud/lib/private/Files/Cache/Scanner.php","line":389,"function":"handleChildren","class":"OC\\Files\\Cache\\Scanner","type":"->"},{"file":"/var/www/owncloud/lib/private/Files/Cache/Scanner.php","line":341,"function":"scanChildren","class":"OC\\Files\\Cache\\Scanner","type":"->"},{"file":"/var/www/owncloud/lib/private/Files/Cache/Watcher.php","line":106,"function":"scan","class":"OC\\Files\\Cache\\Scanner","type":"->"},{"file":"/var/www/owncloud/lib/private/Files/View.php","line":1350,"function":"update","class":"OC\\Files\\Cache\\Watcher","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/owncloud/lib/private/Files/View.php","line":1390,"function":"getCacheEntry","class":"OC\\Files\\View","type":"->"},{"file":"/var/www/owncloud/apps/dav/lib/Connector/Sabre/Directory.php","line":223,"function":"getFileInfo","class":"OC\\Files\\View","type":"->"},{"file":"/var/www/owncloud/3rdparty/sabre/dav/lib/DAV/Tree.php","line":78,"function":"getChild","class":"OCA\\DAV\\Connector\\Sabre\\Directory","type":"->"},{"file":"/var/www/owncloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":971,"function":"getNodeForPath","class":"Sabre\\DAV\\Tree","type":"->"},{"file":"/var/www/owncloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1661,"function":"getPropertiesIteratorForPath","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/owncloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":1646,"function":"writeMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/owncloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":346,"function":"generateMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/owncloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPropFind","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/var/www/owncloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":472,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/owncloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/owncloud/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/owncloud/apps/dav/lib/Server.php","line":332,"function":"exec","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/var/www/owncloud/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/var/www/owncloud/remote.php","line":167,"args":["/var/www/owncloud/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/var/www/owncloud/lib/private/Log/ErrorHandler.php","Line":92,"CustomMessage":"--"},"userAgent":"Mozilla/5.0 (Windows) mirall/3.2.3stable-Win64 (build 20210624) (Nextcloud, windows-10.0.19043 ClientArchitecture: x86_64 OsArchitecture: x86_64)","version":"21.0.2.1","id":"60e2eee5c3dba"}

Nextcloud log (data/nextcloud.log)

Nextcloud log

Insert your Nextcloud log here

Browser log

Browser log

Insert your browser log here, this could for example include:

a) The javascript console log
b) The network log
c) ...

[Spazzt]

For me this error only occures when "Verify ACL access when listing files" on external storage is active.
(External SMB Server in this case is 2012R2)

See forum post:
https://help.nextcloud.com/t/undefined-offset-1-at-var-www-nextcloud-apps-files-external-lib-lib-storage-smb-php-219/91075

The actual error line moves with different nextcloud versions and patchlevels.

With 20.0.11 it is at line 222:
Error: Undefined offset: 1 at /var/www/nextcloud/apps/files_external/lib/Lib/Storage/SMB.php#222

[anduz]

Thank you for this information, I disabled "Verify ACL access when listing files" and now files:scan is working again.
After a reboot the error message is gone.