Federated shared folder can't be used / displayed: "Storage is temporarily not available"

[mhellmeier]

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Steps to reproduce

1. Click on a shared folder in my personal Nextcloud instance that is hosted on another Nextcloud instance
2. The loading-image is showing up for a minute or so
3. The error message "Storage is temporarily not available" appears

Expected behaviour

The content of the shared folder should be displayed.

Actual behaviour

An error message shows up on the upper right corner: "Storage is temporarily not available".
A while ago, the shared folder works. No changes are made with it. The external Nextcloud instance that hosts the folder works as expected. It is also listed in the settings menu under "trusted servers" with a green dot.

A similar problem is also described in #9125 (issue was closed due to missing information).

Server configuration

Operating system:
Ubuntu 20.04.3 LTS

Web server:
(Latest version from Nextcloud Docker image)

Database:
MariaDB 10.5

PHP version:
(Latest version from Nextcloud Docker image)

Nextcloud version:
22.2.0

Updated from an older Nextcloud/ownCloud or fresh install:
Updated every time after a new stable release was published. The problem has existed for several versions now.

Where did you install Nextcloud from:
Docker image

Signing status:

Signing status

Integrity checker has been disabled. Integrity cannot be verified.

List of activated apps:

App list

Enabled:
  - accessibility: 1.8.0
  - admin_audit: 1.12.0
  - circles: 22.1.1
  - cloud_federation_api: 1.5.0
  - comments: 1.12.0
  - contactsinteraction: 1.3.0
  - dav: 1.19.0
  - federatedfilesharing: 1.12.0
  - federation: 1.12.0
  - files: 1.17.0
  - files_external: 1.13.0
  - files_pdfviewer: 2.3.0
  - files_rightclick: 1.1.0
  - files_sharing: 1.14.0
  - files_trashbin: 1.12.0
  - files_versions: 1.15.0
  - files_videoplayer: 1.11.0
  - firstrunwizard: 2.11.0
  - lookup_server_connector: 1.10.0
  - nextcloud_announcements: 1.11.0
  - notifications: 2.10.1
  - oauth2: 1.10.0
  - password_policy: 1.12.0
  - photos: 1.4.0
  - privacy: 1.6.0
  - provisioning_api: 1.12.0
  - recommendations: 1.1.0
  - richdocuments: 4.2.3
  - serverinfo: 1.12.0
  - settings: 1.4.0
  - sharebymail: 1.12.0
  - support: 1.5.0
  - survey_client: 1.10.0
  - systemtags: 1.12.0
  - text: 3.3.0
  - theming: 1.13.0
  - twofactor_backupcodes: 1.11.0
  - updatenotification: 1.12.0
  - user_status: 1.2.0
  - viewer: 1.6.0
  - weather_status: 1.2.0
  - workflowengine: 2.4.0
Disabled:
  - activity
  - bruteforcesettings
  - dashboard
  - encryption
  - external
  - files_markdown
  - logreader
  - qownnotesapi
  - richdocumentscode
  - user_ldap

Nextcloud configuration:

Config report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "cloud.***REMOVED SENSITIVE VALUE***.de"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "https:\/\/cloud.***REMOVED SENSITIVE VALUE***.de",
        "dbtype": "mysql",
        "version": "22.2.0.2",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "vKSSJ_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "logtimezone": "Europe\/Berlin",
        "installed": true,
        "tempdirectory": "\/var\/www\/html\/app\/tmp\/",
        "integrity.check.disabled": true,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "maintenance": false,
        "loglevel": 1,
        "theme": "",
        "mail_sendmailmode": "smtp",
        "htaccess.RewriteBase": "\/",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379,
            "password": "***REMOVED SENSITIVE VALUE***"
        },
        "mysql.utf8mb4": true,
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "forwarded-for-headers": [
            "HTTP_X_FORWARDED_FOR"
        ],
        "overwriteprotocol": "https",
        "overwritehost": "cloud.***REMOVED SENSITIVE VALUE***.de",
        "mail_smtpsecure": "tls",
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "updater.release.channel": "stable",
        "app_install_overwrite": [
            "richdocuments"
        ],
        "default_phone_region": "DE"
    }
}

Are you using external storage, if yes which one:
No.

Are you using encryption:
No.

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

Client configuration

Browser:
Chrome

Operating system:
macOS / Windows / Linux

Logs

Web server error log

During the loading process after I click on the (broken) shared folder, no logs appear.

Web server error log

-

Nextcloud log (data/nextcloud.log)

Nextcloud log

-

Browser log

The following error appears when I click on the folder:

Browser log

translate.js:1112 Uncaught (in promise) Error: getTranslators: detection is already running
    at Zotero.Translate.Web.<anonymous> (translate.js:1112)
    at Zotero.Translate.Web.getTranslators (promise.js:36)
    at Object.init (inject.js:108)
    at Object.historyChanged (inject.js:692)
    at messageListener (messaging_inject.js:122)
    at messaging_inject.js:132

[mhellmeier]

More information from the community can be found in the discussion of the legacy issue:
#9125 (comment)

[grinapo]

Additional info (v22.2.3 + ldap): the error comes on a locally shared file, the file does exists:

  "app": "webdav",                                                                                                                  
  "method": "GET",                                                                                                                  
  "url": "/remote.php/webdav/Incoming%20shared%20stuff/xx.ods",                                                              
  "message": "Storage is temporarily not available",                                                                                
  "userAgent": "Mozilla/5.0 (X11; Linux x86_64; rv:100.0) Gecko/20100101 Firefox/100.0",                                            
  "version": "22.2.3.0",                                                                                                            
  "exception": {                                                                                                                    
    "Exception": "Sabre\\DAV\\Exception\\ServiceUnavailable",     
    "Message": "Storage is temporarily not available",                                                                              
    "Code": 0,                                                                                                                      
    "Trace": [                                                                                                                      
      {                                                                                                                             
        "file": "/var/www/nc/3rdparty/sabre/dav/lib/DAV/CorePlugin.php",                                                    
        "line": 76,                                                                                                                 
        "function": "getNodeForPath",                             
        "class": "OCA\\DAV\\Connector\\Sabre\\ObjectTree",                                                                          
        "type": "->"                                                                                                                
      },                                                                                                                            
      {                                                                                                                             
        "file": "/var/www/nc/3rdparty/sabre/event/lib/WildcardEmitterTrait.php",                                            
        "line": 89,                                                                                                                 
        "function": "httpGet",                                                                                                      
        "class": "Sabre\\DAV\\CorePlugin",                                                                                          
        "type": "->"
      },
...

And displays internal error for the user. For about 20-30 seconds. Then it self-healed, and the file works again. Nothing seems to be logged about why it was unavailable and how did it heal.

[PVince81]

please update to at least Nextcloud 23.0.8 (it will be out in a week or two) as Nextcloud 22 is EOL already, see https://github.com/nextcloud/server/wiki/Maintenance-and-Release-Schedule#nextcloud-24

if the problem persists, please try the following:

1. update oc_storages set available=1, this will reset the timeout and force a recheck (it only rechecks after 10 minutes otherwise)
2. try accessing the shared folder immediately
3. check nextcloud.log for the PROPFIND on the share folder for errors

don't use 23.0.7 yet as .8 comes with a patch that will log more information to debug connection issues: #33103

[mhellmeier]

I just solved it with a manual fix suggested in the issue linked above. Therefore, I am note able to test it anymore. Let's see if some other people from the community can try it!