Account won't load with broken federation share

[djohnson1865]

Steps to reproduce

1. Create a federated share of a folder from instance A to instance B
2. Shut down instance A
3. Attempt to load account with bad share on instance B into android app

Expected behaviour

• Account should load and sync valid files/folders

Actual behaviour

• Account authenticates, but can never sync files. Always shows as "No files here"

Server configuration detail

Operating system: Linux 5.6.0-1-amd64 #1 SMP Debian 5.6.7-1 (2020-04-29) x86_64

Webserver: nginx/1.14.0 (fpm-fcgi)

Database: pgsql PostgreSQL 12.2 (Debian 12.2-2.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit

PHP version:

7.2.24-0ubuntu0.18.04.6
Modules loaded: Core, date, libxml, openssl, pcre, zlib, filter, hash, Reflection, SPL, sodium, session, standard, cgi-fcgi, mysqlnd, PDO, xml, apcu, apc, bcmath, bz2, calendar, ctype, curl, dom, mbstring, fileinfo, ftp, gd, gettext, iconv, imagick, intl, json, exif, mysqli, pdo_mysql, pdo_pgsql, pgsql, Phar, posix, readline, shmop, SimpleXML, sockets, sysvmsg, sysvsem, sysvshm, tokenizer, wddx, xmlreader, xmlwriter, xsl, zip, Zend OPcache

Nextcloud version: 18.0.7 - 18.0.7.1

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

Where did you install Nextcloud from: Tar from website

List of activated apps

Enabled:
 - accessibility: 1.4.0
 - activity: 2.11.0
 - admin_audit: 1.8.0
 - audioplayer: 2.11.2
 - bruteforcesettings: 1.6.0
 - calendar: 2.0.3
 - cloud_federation_api: 1.1.0
 - comments: 1.8.0
 - contacts: 3.3.0
 - dav: 1.14.0
 - federatedfilesharing: 1.8.0
 - federation: 1.8.0
 - files: 1.13.1
 - files_external: 1.9.0
 - files_pdfviewer: 1.7.0
 - files_sharing: 1.10.1
 - files_trashbin: 1.8.0
 - files_versions: 1.11.0
 - files_videoplayer: 1.7.0
 - firstrunwizard: 2.7.0
 - gallery: 18.5.0
 - groupfolders: 6.0.6
 - impersonate: 1.5.2
 - issuetemplate: 0.6.0
 - logreader: 2.3.0
 - lookup_server_connector: 1.6.0
 - mail: 1.4.1
 - news: 14.1.11
 - nextcloud_announcements: 1.7.0
 - notes: 3.6.1
 - notifications: 2.6.0
 - oauth2: 1.6.0
 - onlyoffice: 4.3.0
 - password_policy: 1.8.0
 - photos: 1.0.0
 - privacy: 1.2.0
 - provisioning_api: 1.8.0
 - serverinfo: 1.8.0
 - settings: 1.0.0
 - sharebymail: 1.8.0
 - socialsharing_email: 2.1.0
 - spreed: 8.0.10
 - support: 1.1.1
 - survey_client: 1.6.0
 - systemtags: 1.8.0
 - tasks: 0.13.3
 - text: 2.0.0
 - theming: 1.9.0
 - twofactor_backupcodes: 1.7.0
 - twofactor_totp: 4.1.3
 - twofactor_u2f: 5.1.0
 - updatenotification: 1.8.0
 - viewer: 1.2.0
 - workflowengine: 2.0.0
Disabled:
 - breezedark
 - encryption
 - files_rightclick
 - recommendations
 - richdocuments
 - riotchat
 - social
 - user_ldap

Configuration (config/config.php)

{
    "instanceid": "***REMOVED SENSITIVE VALUE***",
    "passwordsalt": "***REMOVED SENSITIVE VALUE***",
    "secret": "***REMOVED SENSITIVE VALUE***",
    "trusted_domains": [
        "nextcloud.devonrjohnson.stream"
    ],
    "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
    "datadirectory": "***REMOVED SENSITIVE VALUE***",
    "overwrite.cli.url": "https:\/\/nextcloud.devonrjohnson.stream\/",
    "dbtype": "pgsql",
    "version": "18.0.7.1",
    "dbname": "***REMOVED SENSITIVE VALUE***",
    "dbhost": "***REMOVED SENSITIVE VALUE***",
    "dbport": "",
    "dbtableprefix": "oc_",
    "dbuser": "***REMOVED SENSITIVE VALUE***",
    "dbpassword": "***REMOVED SENSITIVE VALUE***",
    "forwarded_for_headers": [
        "HTTP_X_FORWARDED",
        "HTTP_FORWARDED_FOR"
    ],
    "installed": true,
    "mail_smtpmode": "smtp",
    "mail_from_address": "***REMOVED SENSITIVE VALUE***",
    "mail_domain": "***REMOVED SENSITIVE VALUE***",
    "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
    "mail_smtpport": "25",
    "mysql.utf8mb4": true,
    "maintenance": false,
    "memcache.local": "\\OC\\Memcache\\APCu",
    "theme": "",
    "loglevel": 0,
    "logfile": "\/var\/log\/Nextcloud\/nextcloud.log",
    "log_rotate_size": 104857600,
    "mail_smtpdebug": "true",
    "updater.release.channel": "stable",
    "twofactor_enforced": "false",
    "twofactor_enforced_groups": [],
    "twofactor_enforced_excluded_groups": [],
    "mail_sendmailmode": "smtp",
    "app_install_overwrite": [
        "files_reader",
        "social"
    ]
}

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

Are you using encryption: false

Are you using an external user-backend, if yes which one: No

Client configuration

Android version: Tested on Android 7 and 9

Device Model: Tested on several devices

Nextcloud app version: Tested with 3.12.1 and dev 20200808

Nextcloud Server version: 18.0.7

Logs

Web server error log

Reproducing does not produce error in web server

Nextcloud log

[webdav] Debug: OCP\Files\StorageNotAvailableException:  at <<closure>>

 0. /var/www/html/nextcloud/lib/private/Files/Storage/Wrapper/Availability.php line 242
    OC\Files\Storage\Wrapper\Availability->checkAvailability()
 1. /var/www/html/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php line 225
    OC\Files\Storage\Wrapper\Availability->file_exists("Readme.md")
 2. /var/www/html/nextcloud/lib/private/Files/View.php line 1335
    OC\Files\Storage\Wrapper\Wrapper->file_exists("Readme.md")
 3. /var/www/html/nextcloud/lib/private/Files/View.php line 1384
    OC\Files\View->getCacheEntry(OCA\Files_Trashb ... l}, "Readme.md", "/Devon/files/Comics Test/Readme.md")
 4. /var/www/html/nextcloud/lib/private/Files/Node/Root.php line 200
    OC\Files\View->getFileInfo("/Devon/files/Comics Test/Readme.md")
 5. /var/www/html/nextcloud/lib/private/Files/Node/Folder.php line 137
    OC\Files\Node\Root->get("/Devon/files/Comics Test/Readme.md")
 6. /var/www/html/nextcloud/lib/private/Files/Node/Folder.php line 146
    OC\Files\Node\Folder->get("Readme.md")
 7. /var/www/html/nextcloud/apps/text/lib/Service/WorkspaceService.php line 28
    OC\Files\Node\Folder->nodeExists("Readme.md")
 8. /var/www/html/nextcloud/apps/text/lib/DAV/WorkspacePlugin.php line 101
    OCA\Text\Service\WorkspaceService->getFile(OC\Files\Node\Folder {})
 9. /var/www/html/nextcloud/3rdparty/sabre/dav/lib/DAV/PropFind.php line 98
    OCA\Text\DAV\WorkspacePlugin->OCA\Text\DAV\{closure}("*** sensitive parameters replaced ***")
10. /var/www/html/nextcloud/apps/text/lib/DAV/WorkspacePlugin.php line 107
    Sabre\DAV\PropFind->handle("{http://nextcloud.org/ns}rich-workspace", Closure {})
11. <<closure>>
    OCA\Text\DAV\WorkspacePlugin->propFind(Sabre\DAV\PropFind {}, OCA\DAV\Connector\Sabre\Directory {})
12. /var/www/html/nextcloud/3rdparty/sabre/event/lib/EventEmitterTrait.php line 105
    call_user_func_array([OCA\Text\DAV\Wo ... "], [Sabre\DAV\PropF ... }])
13. /var/www/html/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 1059
    Sabre\Event\EventEmitter->emit("propFind", [Sabre\DAV\PropF ... }])
14. /var/www/html/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 981
    Sabre\DAV\Server->getPropertiesByNode(Sabre\DAV\PropFind {}, OCA\DAV\Connector\Sabre\Directory {})
15. /var/www/html/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 1666
    Sabre\DAV\Server->getPropertiesIteratorForPath("", ["{http://ownclo ... "], 1)
16. /var/www/html/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php line 355
    Sabre\DAV\Server->generateMultiStatus(Generator {}, false)
17. <<closure>>
    Sabre\DAV\CorePlugin->httpPropFind(Sabre\HTTP\Reque ... "}, Sabre\HTTP\Response {})
18. /var/www/html/nextcloud/3rdparty/sabre/event/lib/EventEmitterTrait.php line 105
    call_user_func_array([Sabre\DAV\CorePlugin {},"httpPropFind"], [Sabre\HTTP\Requ ... }])
19. /var/www/html/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 479
    Sabre\Event\EventEmitter->emit("method:PROPFIND", [Sabre\HTTP\Requ ... }])
20. /var/www/html/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php line 254
    Sabre\DAV\Server->invokeMethod(Sabre\HTTP\Reque ... "}, Sabre\HTTP\Response {})
21. /var/www/html/nextcloud/apps/dav/appinfo/v1/webdav.php line 82
    Sabre\DAV\Server->exec()
22. /var/www/html/nextcloud/remote.php line 165
    require_once("/var/www/html/n ... p")

PROPFIND /remote.php/webdav/
from xxx.xxx.xxx.xxx by XXXXXXX at 2020-08-11T01:15:54+00:00


[no app in context] Debug: Deprecated event type for {"[object] (OCP\SabrePluginEvent)":{"*statusCode":200,"*message":"","*server":{"[object] (OCA\DAV\Connector\Sabre\Server)":{"tree":"[object] (OCA\DAV\Connector\Sabre\ObjectTree)","*baseUri":"/remote.php/webdav/","httpResponse":"[object] (Sabre\HTTP\Response)","httpRequest":"[object] (Sabre\HTTP\Request)","sapi":"[object] (Sabre\HTTP\Sapi)","*plugins":[],"transactionType":null,"protectedProperties":{"...":"Over 20 items, aborting normalization"},"debugExceptions":false,"resourceTypeMapping":[],"enablePropfindDepthInfinity":true,"xml":"[object] (Sabre\DAV\Xml\Service)","*listeners":{"...":"Over 20 items, aborting normalization"},"*logger":null}},"Symfony\Contracts\EventDispatcher\EventpropagationStopped":false}}: null

PROPFIND /remote.php/webdav/
from xxx.xxx.xxx.xxx by XXXXX at 2020-08-11T01:15:54+00:00

Browser log

N/A

[tobiasKaminsky]

@nextcloud/server-triage this seems to be a bug on server, shall I move it?

[kesselb]

I would close this report here in favor of nextcloud/server#14797.