[Bug]: Trouble accessing data for certain users: "Exception thrown: OCP\Files\GenericFileException" when Rich Workspaces is enabled w/ external storage and ldap

[supr4s]

⚠️ 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

Hi everyone,

We have a whole group of LDAP users who connect to the Nextcloud with external storage (SMB/CIFS) that maps automatically as soon as the user logs on.
Since upgrading to 28.0.1, some users are accessing network folders but nothing is visible (No files) and I'm getting generation errors at the same time :

{"reqId":"M3EwBxeysCLR3Dnko63W","level":3,"time":"2024-01-09T15:33:50+00:00","remoteAddr":"x.x.x.x","user":"74C480CF-3D78-496B-AA68-A3E7A3C2ACE3","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/74C480CF-3D78-496B-AA68-A3E7A3C2ACE3/DONNEES/","message":"Exception thrown: OCP\\Files\\GenericFileException","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0","version":"28.0.1.1","exception":{"Exception":"OCP\\Files\\GenericFileException","Message":"","Code":0,"Trace":[{"file":"/srv/nextcloud/www/apps/text/lib/DAV/WorkspacePlugin.php","line":119,"function":"getContent","class":"OC\\Files\\Node\\File","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/PropFind.php","line":95,"function":"OCA\\Text\\DAV\\{closure}","class":"OCA\\Text\\DAV\\WorkspacePlugin","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/srv/nextcloud/www/apps/text/lib/DAV/WorkspacePlugin.php","line":117,"function":"handle","class":"Sabre\\DAV\\PropFind","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"propFind","class":"OCA\\Text\\DAV\\WorkspacePlugin","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":1052,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":984,"function":"getPropertiesByNode","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":1662,"function":"getPropertiesIteratorForPath","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":1647,"function":"writeMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":346,"function":"generateMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPropFind","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":472,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/apps/dav/lib/Server.php","line":370,"function":"exec","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/remote.php","line":172,"args":["/srv/nextcloud/www/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/srv/nextcloud/www/lib/private/Files/Node/File.php","Line":56,"message":"","exception":{},"CustomMessage":"Exception thrown: OCP\\Files\\GenericFileException"}}

So the network folder is accessible, but when it is accessed, everything remains empty and an error is generated.

I can't reproduce the problem for everyone, only for certain users. For example, user A will have access while user B won't (even though on the Active Directory and Nextcloud sides they have exactly the same rights and permissions, they're practically identical profiles).

I came across an issue that seems similar, as we also use Collabora :

https://help.nextcloud.com/t/ocp-files-genericfileexception-in-file-php-nach-occ-app-update-all/175085/2

Despite deactivating the richdocuments and richdocumentscode plugins, nothing to do still the same. I've also disabled preview and ACL checking in the external storage settings, but the problem persists. I also have the same problem if I create a share manually from the user account, in addition to the share done automatically at login.

I also tried to delete the LDAP user from Nextcloud but it was impossible ((Is it possible to force the deletion and then reconnect as if from scratch? That would be a good idea) :

sudo -u nextcloud php /srv/nextcloud/www/occ user:delete <UUID>
The specified user could not be deleted. Please check the logs.

I also deleted his Nextcloud user profile folder, then reconnected, but that didn't work.

The size of the folder is displayed, and you can access it (a sign that the link is working), but as soon as you access it, everything is empty.

Steps to reproduce

• Set up LDAP authentication
• Set up automatic network mounting on user login (SMB)
• On access, folder mounts, can be accessed but Nextcloud displays it as empty

Expected behavior

The contents of the folder are displayed.

Installation method

None

Nextcloud Server version

28

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.2

Web server

Nginx

Database engine version

MySQL

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

Upgraded to a MAJOR version (ex. 22 to 23)

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": {
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "xxx.myclient.com"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "28.0.1.1",
        "overwrite.cli.url": "http:\/\/localhost",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "default_phone_region": "FR_fr",
        "trashbin_retention_obligation": "auto",
        "skeletondirectory": "",
        "force_language": "fr",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "dbindex": 0,
            "password": "***REMOVED SENSITIVE VALUE***",
            "timeout": 1.5
        },
        "log_type": "file",
        "logfile": "\/srv\/nextcloud\/www\/data\/nextcloud.log",
        "loglevel": 2,
        "theme": "",
        "maintenance": false,
        "versions_retention_obligation": "auto, 3",
        "ldapProviderFactory": "OCA\\User_LDAP\\LDAPProviderFactory"
    }
}

List of activated Apps

Enabled:
  - activity: 2.20.0
  - auto_groups: 1.5.2
  - cloud_federation_api: 1.11.0
  - comments: 1.18.0
  - dav: 1.29.1
  - federatedfilesharing: 1.18.0
  - files: 2.0.0
  - files_external: 1.20.0
  - files_lock: 28.0.1
  - files_pdfviewer: 2.9.0
  - files_reminders: 1.1.0
  - files_sharing: 1.20.0
  - files_trashbin: 1.18.0
  - files_versions: 1.21.0
  - logreader: 2.13.0
  - lookup_server_connector: 1.16.0
  - notifications: 2.16.0
  - oauth2: 1.16.3
  - password_policy: 1.18.0
  - photos: 2.4.0
  - privacy: 1.12.0
  - provisioning_api: 1.18.0
  - related_resources: 1.3.0
  - settings: 1.10.1
  - smb_test: 0.3.8
  - text: 3.9.1
  - theming: 2.3.0
  - twofactor_backupcodes: 1.17.0
  - twofactor_totp: 10.0.0-beta.2
  - user_ldap: 1.19.0
  - viewer: 2.2.0
  - workflowengine: 2.10.0

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

{"reqId":"M3EwBxeysCLR3Dnko63W","level":3,"time":"2024-01-09T15:33:50+00:00","remoteAddr":"x.x.x.x","user":"74C480CF-3D78-496B-AA68-A3E7A3C2ACE3","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/74C480CF-3D78-496B-AA68-A3E7A3C2ACE3/DONNEES/","message":"Exception thrown: OCP\\Files\\GenericFileException","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0","version":"28.0.1.1","exception":{"Exception":"OCP\\Files\\GenericFileException","Message":"","Code":0,"Trace":[{"file":"/srv/nextcloud/www/apps/text/lib/DAV/WorkspacePlugin.php","line":119,"function":"getContent","class":"OC\\Files\\Node\\File","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/PropFind.php","line":95,"function":"OCA\\Text\\DAV\\{closure}","class":"OCA\\Text\\DAV\\WorkspacePlugin","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/srv/nextcloud/www/apps/text/lib/DAV/WorkspacePlugin.php","line":117,"function":"handle","class":"Sabre\\DAV\\PropFind","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"propFind","class":"OCA\\Text\\DAV\\WorkspacePlugin","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":1052,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":984,"function":"getPropertiesByNode","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":1662,"function":"getPropertiesIteratorForPath","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":1647,"function":"writeMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":346,"function":"generateMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPropFind","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":472,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/apps/dav/lib/Server.php","line":370,"function":"exec","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/remote.php","line":172,"args":["/srv/nextcloud/www/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/srv/nextcloud/www/lib/private/Files/Node/File.php","Line":56,"message":"","exception":{},"CustomMessage":"Exception thrown: OCP\\Files\\GenericFileException"}}

Additional info

No response

[joshtrichards]

Something makes me think the final error in that stack trace may be a red herring, but to semi-rule that out you can try disabling rich workspaces globally to see if there is any change: occ config:app:set text workspace_available --value=0 (restart your app/FPM server for good measure after doing so).

Are there any other log entries from the point of trying to log-in and the provided stack trace?

It might be informative to lower your loglevel temporarily, to 1 and - if still nothing interesting - to 0 (DEBUG) briefly.

[supr4s]

Hi @joshtrichards ,

Thanks for you quick feedback !

Well, it looks like you've found the problem.

One :

occ config:app:set text workspace_available --value=0

Fix the problem, everything working's again.

If i re-active rick workspace :

occ config:app:set text workspace_available --value=1

The problem returns.

FYI, here are the logs when log verbosity is set on 0 :

{"reqId":"AYLZKwmJTQSPx2pKrtAb","level":3,"time":"2024-01-10T08:38:48+00:00","remoteAddr":"x.x.x.x","user":"F146EBCF-9C26-42F9-A10D-D83394C1A610","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/F146EBCF-9C26-42F9-A10D-D83394C1A610/DONNEES/","message":"Exception thrown: OCP\\Files\\GenericFileException","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:121.0) Gecko/20100101 Firefox/121.0","version":"28.0.1.1","exception":{"Exception":"OCP\\Files\\GenericFileException","Message":"","Code":0,"Trace":[{"file":"/srv/nextcloud/www/apps/text/lib/DAV/WorkspacePlugin.php","line":119,"function":"getContent","class":"OC\\Files\\Node\\File","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/PropFind.php","line":95,"function":"OCA\\Text\\DAV\\{closure}","class":"OCA\\Text\\DAV\\WorkspacePlugin","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/srv/nextcloud/www/apps/text/lib/DAV/WorkspacePlugin.php","line":117,"function":"handle","class":"Sabre\\DAV\\PropFind","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"propFind","class":"OCA\\Text\\DAV\\WorkspacePlugin","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":1052,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":984,"function":"getPropertiesByNode","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":1662,"function":"getPropertiesIteratorForPath","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":1647,"function":"writeMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/CorePlugin.php","line":346,"function":"generateMultiStatus","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/event/lib/WildcardEmitterTrait.php","line":89,"function":"httpPropFind","class":"Sabre\\DAV\\CorePlugin","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":472,"function":"emit","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":253,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/3rdparty/sabre/dav/lib/DAV/Server.php","line":321,"function":"start","class":"Sabre\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/apps/dav/lib/Server.php","line":370,"function":"exec","class":"Sabre\\DAV\\Server","type":"->"},
{"file":"/srv/nextcloud/www/apps/dav/appinfo/v2/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->"},{"file":"/srv/nextcloud/www/remote.php","line":172,"args":["/srv/nextcloud/www/apps/dav/appinfo/v2/remote.php"],"function":"require_once"}],"File":"/srv/nextcloud/www/lib/private/Files/Node/File.php","Line":56,"message":"","exception":{},"CustomMessage":"Exception thrown: OCP\\Files\\GenericFileException"}}

Can we consider this a bug with the latest server version (28.0.1)?

Thanks again for your help !

[svenseeberg]

We have the same issue but without SMB shares. occ config:app:set text workspace_available --value=0 fixed it.

[joshtrichards]

@svenseeberg Anything else similar to the original reporter's environment? LDAP auth perhaps?

[joshtrichards]

Can we consider this a bug with the latest server version (28.0.1)?

Or the text app (which admittedly is a standard app so the short answer would be "yes" 😄 ):

https://github.com/nextcloud/text/blob/c7bd53f796469fad9601b1c892eff15c9a394e33/lib/DAV/WorkspacePlugin.php#L103-L129

The bit of code here has been tweaked a few times for performance (though not recently). I think lines 116-128 more properly belong up under the if at 107 but it'll require a closer look. I'm also hesitant to make the change blindly since this bit of code has been static for 2 years and was a little hairy to mess with then it looks like (nextcloud/text#2608), so there may be something else going on here triggering this suddenly now for you.

For example, I don't see any problem in a stock install (i.e. without LDAP).

[brotkastn]

I can confirm the issue - and the workaround mentioned in this comment above .

The weird thing is: we have ~10 Users all but one via LDAP. Only one had trouble accessing their files, others seemed fine.

Thank you for the quick workaround, and have a nice day :)

[piotr-sikora-v]

I had same issue

occ config:app:set text workspace_available --value=0 

fixed it

[svenseeberg]

@svenseeberg Anything else similar to the original reporter's environment? LDAP auth perhaps?

Sorry for the late answer. Yes, LDAP Auth.

The weird thing is: we have ~10 Users all but one via LDAP. Only one had trouble accessing their files, others seemed fine.

And this is also true in my case.