[Bug]: External Storage marked as unavailable for a short period of time after a file is uploaded

[ffrouin]

⚠️ 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

Hello,

I figured out, upgrading a nextcloud server from 30.0.1 to the latest release something broke with an external storage module. After investigations, it looks to be related to changes appearing in 30.0.4 release (lib/private/Files/SetupManager.php). If I do restore the 30.0.2 release of this file with the latest release, it works back for me.

Issue looks to be related to the Availability object class involved in the process to check external storage availability. After uploading a file on the external storage, the storage is marked as unavailable for less than a minute. The file is correctly uploaded., we can see when external storage is resumed.

The external backend we do use is a private webdav server working fine with rclone or cadaver dav clients as examples. Issue looks to be related to webdav calls between nextcloud server and the webdav external storage. We probably miss something with our webdav service implementation. Could someone help me to identify what's going wrong between nextcloud and our webdav external storage ?

Best Regards,
Freddy.

Steps to reproduce

As our external storage is a private technology, there is no way for the public to actually replay this issue.

Expected behavior

After uploading a file on the external storage, the storage is marked as unavailable for less than a minute. The file is correctly uploaded., we can see when external storage is resumed.

Nextcloud Server version

31

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Apache (supported)

Database engine version

MySQL

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

Updated from a MINOR version 30.0.2 to 30.0.4 to enable the issue.

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

List of activated Apps

Nextcloud Signing status

Nextcloud Logs

2025-06-05T11:47:29.493059+02:00 nextcloud-2 nextcloud[52306]: {"reqId":"fsAv2sm6t5P5P7oRbgVU","level":3,"time":"2025-06-05T09:47:29+00:00","remoteAddr":"192.168.248.1","user":"freddy","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/freddy/CIDgravitygateway/","message":"{\"Exception\":\"Sabre\\\\DAV\\\\Exception\\\\ServiceUnavailable\",\"Message\":\"Storage with mount id 1 is not available\",\"Code\":0,\"Trace\":[

Additional info

No response

[joshtrichards]

Please provide the full stack trace.

Also, to confirm, this is an External Storage volume of type WebDAV?

The changes you seem to be referencing are from #49494

[ffrouin]

Hi Josh,

Many thanks for your reply, I do confirm this is an external storage of type WebDAV. Here is the trace I do recover from syslog :

2025-06-12T10:06:31.900716+02:00 nextcloud-2 nextcloud[556924]: {"reqId":"o48By6cnKE5lJeZCzQVL","level":3,"time":"2025-06-12T08:06:31+00:00","remoteAddr":"192.168.248.1","user":"admin","app":"webdav","method":"PROPFIND","url":"/remote.php/dav/files/admin/PublicFilecoin/","message":"{\"Exception\":\"Sabre\\\\DAV\\\\Exception\\\\ServiceUnavailable\",\"Message\":\"Storage with mount id 4 is not available\",\"Code\":0,\"Trace\":[{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php\",\"line\":95,\"function\":\"getChild\",\"class\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Directory\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":971,\"function\":\"getNodeForPath\",\"class\":\"Sabre\\\\DAV\\\\Tree\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":1664,\"function\":\"getPropertiesIteratorForPath\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":1649,\"function\":\"writeMultiStatus\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php\",\"line\":346,\"function\":\"generateMultiStatus\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php\",\"line\":89,\"function\":\"httpPropFind\",\"class\":\"Sabre\\\\DAV\\\\CorePlugin\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":472,\"function\":\"emit\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/apps/dav/lib/Connector/Sabre/Server.php\",\"line\":49,\"function\":\"invokeMethod\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/apps/dav/lib/Server.php\",\"line\":400,\"function\":\"start\",\"class\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/apps/dav/appinfo/v2/remote.php\",\"line\":21,\"function\":\"exec\",\"class\":\"OCA\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/remote.php\",\"line\":145,\"args\":[\"/opt/nextcloud/apps/dav/appinfo/v2/remote.php\"],\"function\":\"require_once\"}],\"File\":\"/opt/nextcloud/apps/dav/lib/Connector/Sabre/Directory.php\",\"Line\":185,\"Previous\":{\"Exception\":\"OCP\\\\Files\\\\StorageNotAvailableException\",\"Message\":\"Storage with mount id 4 is not available\",\"Code\":1,\"Trace\":[{\"file\":\"/opt/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php\",\"line\":298,\"function\":\"acquireLock\",\"class\":\"OC\\\\Files\\\\Storage\\\\FailedStorage\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/Storage/Wrapper/Wrapper.php\",\"line\":298,\"function\":\"acquireLock\",\"class\":\"OC\\\\Files\\\\Storage\\\\Wrapper\\\\Wrapper\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/View.php\",\"line\":2056,\"function\":\"acquireLock\",\"class\":\"OC\\\\Files\\\\Storage\\\\Wrapper\\\\Wrapper\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/View.php\",\"line\":2161,\"function\":\"lockPath\",\"class\":\"OC\\\\Files\\\\View\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/View.php\",\"line\":1389,\"function\":\"lockFile\",\"class\":\"OC\\\\Files\\\\View\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/View.php\",\"line\":1422,\"function\":\"getCacheEntry\",\"class\":\"OC\\\\Files\\\\View\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/apps/dav/lib/Connector/Sabre/Directory.php\",\"line\":183,\"function\":\"getFileInfo\",\"class\":\"OC\\\\Files\\\\View\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php\",\"line\":95,\"function\":\"getChild\",\"class\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Directory\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":971,\"function\":\"getNodeForPath\",\"class\":\"Sabre\\\\DAV\\\\Tree\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":1664,\"function\":\"getPropertiesIteratorForPath\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":1649,\"function\":\"writeMultiStatus\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/CorePlugin.php\",\"line\":346,\"function\":\"generateMultiStatus\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/event/lib/WildcardEmitterTrait.php\",\"line\":89,\"function\":\"httpPropFind\",\"class\":\"Sabre\\\\DAV\\\\CorePlugin\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":472,\"function\":\"emit\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/apps/dav/lib/Connector/Sabre/Server.php\",\"line\":49,\"function\":\"invokeMethod\",\"class\":\"Sabre\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/apps/dav/lib/Server.php\",\"line\":400,\"function\":\"start\",\"class\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/apps/dav/appinfo/v2/remote.php\",\"line\":21,\"function\":\"exec\",\"class\":\"OCA\\\\DAV\\\\Server\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/remote.php\",\"line\":145,\"args\":[\"/opt/nextcloud/apps/dav/appinfo/v2/remote.php\"],\"function\":\"require_once\"}],\"File\":\"/opt/nextcloud/lib/private/Files/Storage/FailedStorage.php\",\"Line\":169,\"Hint\":\"Storage is temporarily not available\",\"Previous\":{\"Exception\":\"OCP\\\\Files\\\\StorageNotAvailableException\",\"Message\":\"Storage with mount id 4 is not available\",\"Code\":1,\"Trace\":[{\"function\":\"OCA\\\\Files_External\\\\Config\\\\{closure}\",\"class\":\"OCA\\\\Files_External\\\\Config\\\\ConfigAdapter\",\"type\":\"->\",\"args\":[\"*** sensitive parameters replaced ***\"]},{\"file\":\"/opt/nextcloud/apps/files_external/lib/Config/ConfigAdapter.php\",\"line\":110,\"function\":\"array_map\"},{\"file\":\"/opt/nextcloud/lib/private/Files/Config/MountProviderCollection.php\",\"line\":72,\"function\":\"getMountsForUser\",\"class\":\"OCA\\\\Files_External\\\\Config\\\\ConfigAdapter\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/Config/MountProviderCollection.php\",\"line\":121,\"function\":\"getMountsFromProvider\",\"class\":\"OC\\\\Files\\\\Config\\\\MountProviderCollection\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/SetupManager.php\",\"line\":203,\"function\":\"addMountForUser\",\"class\":\"OC\\\\Files\\\\Config\\\\MountProviderCollection\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/SetupManager.php\",\"line\":306,\"function\":\"OC\\\\Files\\\\{closure}\",\"class\":\"OC\\\\Files\\\\SetupManager\",\"type\":\"->\",\"args\":[\"*** sensitive parameters replaced ***\"]},{\"file\":\"/opt/nextcloud/lib/private/Files/SetupManager.php\",\"line\":202,\"function\":\"setupForUserWith\",\"class\":\"OC\\\\Files\\\\SetupManager\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/SetupManager.php\",\"line\":380,\"function\":\"setupForUser\",\"class\":\"OC\\\\Files\\\\SetupManager\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/Mount/Manager.php\",\"line\":75,\"function\":\"setupForPath\",\"class\":\"OC\\\\Files\\\\SetupManager\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/lib/private/Files/View.php\",\"line\":1418,\"function\":\"find\",\"class\":\"OC\\\\Files\\\\Mount\\\\Manager\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/apps/dav/lib/Connector/Sabre/Directory.php\",\"line\":183,\"function\":\"getFileInfo\",\"class\":\"OC\\\\Files\\\\View\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Tree.php\",\"line\":95,\"function\":\"getChild\",\"class\":\"OCA\\\\DAV\\\\Connector\\\\Sabre\\\\Directory\",\"type\":\"->\"},{\"file\":\"/opt/nextcloud/3rdparty/sabre/dav/lib/DAV/Server.php\",\"line\":971,\"function\":\"getNodeForPath\",\"class\":\"Sabre\\\\DAV\\\\Tree\",\"type\":\"->\"},{\"file\":\"/opt/nextc

Best Regards,
Freddy.