[Bug]: Virtual File Syncing on MacOS causes applications to complain file has been modified

[rexbron]

⚠️ Before submitting, please verify the following: ⚠️

• This is a bug, not a question or a configuration issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• I agree to follow Nextcloud's Code of Conduct

Bug description

When using 1st party MacOS applications like Pages and Number, after a save or an autosave, the application will complain that the file has been modified by another application and prompt the user to save another copy or overwrite.

This is likely related to Issue #6212 #6190 but the fix is not sufficient for MacOS.

Steps to reproduce

1. Add a Virtual File folder on MacOS
2. Create a document in Pages or other 1st Party MacOS App
3. Save the document
4. After Nextcloud syncs the document, Pages will complain the file has been modified since last save.

Expected behavior

Nextcloud Syncing should not cause apps to think the file has been modified.

Which files are affected by this bug

LASS S2 Suspense File.md

Operating system

macOS

Which version of the operating system you are running.

15.2

Package

Official macOS 12+ universal pkg

Nextcloud Server version

30.0.5

Nextcloud Desktop Client version

3.15.3

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

Updated from a minor version (ex. 3.4.2 to 3.4.4)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

{"reqId":"aWZie8xW186MIGQTxILJ","level":3,"time":"2025-02-08T14:16:33+00:00","remoteAddr":"","user":"--","app":"richdocuments","method":"","url":"--","message":"Failed to fetch discovery: cURL error 7: Failed to connect to cloud.hunter.camera port 443 after 1 ms: Could not connect to server (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://cloud.hunter.camera/hosting/discovery","userAgent":"--","version":"30.0.5.1","exception":{"Exception":"GuzzleHttp\\Exception\\ConnectException","Message":"cURL error 7: Failed to connect to cloud.hunter.camera port 443 after 1 ms: Could not connect to server (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://cloud.hunter.camera/hosting/discovery","Code":0,"Trace":[{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/Handler/CurlFactory.php","line":158,"function":"createRejection","class":"GuzzleHttp\\Handler\\CurlFactory","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/Handler/CurlFactory.php","line":110,"function":"finishError","class":"GuzzleHttp\\Handler\\CurlFactory","type":"::","args":[{"__class__":"GuzzleHttp\\Handler\\CurlHandler"},"*** sensitive parameters replaced ***",{"__class__":"GuzzleHttp\\Handler\\CurlFactory"}]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/Handler/CurlHandler.php","line":47,"function":"finish","class":"GuzzleHttp\\Handler\\CurlFactory","type":"::","args":[{"__class__":"GuzzleHttp\\Handler\\CurlHandler"},"*** sensitive parameters replaced ***",{"__class__":"GuzzleHttp\\Handler\\CurlFactory"}]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/Middleware.php","line":142,"function":"__invoke","class":"GuzzleHttp\\Handler\\CurlHandler","type":"->","args":["*** sensitive parameters replaced ***","*** sensitive parameters replaced ***"]},{"file":"/var/www/html/lib/private/Http/Client/DnsPinMiddleware.php","line":109,"function":"GuzzleHttp\\{closure}","class":"GuzzleHttp\\Middleware","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/PrepareBodyMiddleware.php","line":35,"function":"OC\\Http\\Client\\{closure}","class":"OC\\Http\\Client\\DnsPinMiddleware","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/Middleware.php","line":31,"function":"__invoke","class":"GuzzleHttp\\PrepareBodyMiddleware","type":"->","args":["*** sensitive parameters replaced ***","*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/RedirectMiddleware.php","line":71,"function":"GuzzleHttp\\{closure}","class":"GuzzleHttp\\Middleware","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/Middleware.php","line":66,"function":"__invoke","class":"GuzzleHttp\\RedirectMiddleware","type":"->","args":["*** sensitive parameters replaced ***","*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/HandlerStack.php","line":75,"function":"GuzzleHttp\\{closure}","class":"GuzzleHttp\\Middleware","type":"::","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/Client.php","line":333,"function":"__invoke","class":"GuzzleHttp\\HandlerStack","type":"->","args":["*** sensitive parameters replaced ***","*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/Client.php","line":169,"function":"transfer","class":"GuzzleHttp\\Client","type":"->","args":["*** sensitive parameters replaced ***","*** sensitive parameters replaced ***"]},{"file":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/Client.php","line":189,"function":"requestAsync","class":"GuzzleHttp\\Client","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/lib/private/Http/Client/Client.php","line":205,"function":"request","class":"GuzzleHttp\\Client","type":"->","args":["*** sensitive parameters replaced ***","*** sensitive parameters replaced ***",{"verify":"/var/www/html/resources/config/ca-bundle.crt","timeout":5,"nextcloud":{"allow_local_address":true},"headers":{"User-Agent":"Nextcloud Server Crawler","Accept-Encoding":"gzip"},"synchronous":true}]},{"file":"/var/www/html/custom_apps/richdocuments/lib/Service/DiscoveryService.php","line":59,"function":"get","class":"OC\\Http\\Client\\Client","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/custom_apps/richdocuments/lib/Service/CachedRequestService.php","line":74,"function":"sendRequest","class":"OCA\\Richdocuments\\Service\\DiscoveryService","type":"->","args":[{"__class__":"OC\\Http\\Client\\Client"}]},{"file":"/var/www/html/custom_apps/richdocuments/lib/Backgroundjobs/ObtainCapabilities.php","line":41,"function":"fetch","class":"OCA\\Richdocuments\\Service\\CachedRequestService","type":"->","args":[]},{"file":"/var/www/html/lib/public/BackgroundJob/Job.php","line":61,"function":"run","class":"OCA\\Richdocuments\\Backgroundjobs\\ObtainCapabilities","type":"->","args":[null]},{"file":"/var/www/html/lib/public/BackgroundJob/TimedJob.php","line":88,"function":"start","class":"OCP\\BackgroundJob\\Job","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"}]},{"file":"/var/www/html/lib/public/BackgroundJob/TimedJob.php","line":75,"function":"start","class":"OCP\\BackgroundJob\\TimedJob","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"}]},{"file":"/var/www/html/cron.php","line":162,"function":"execute","class":"OCP\\BackgroundJob\\TimedJob","type":"->","args":[{"__class__":"OC\\BackgroundJob\\JobList"}]}],"File":"/var/www/html/3rdparty/guzzlehttp/guzzle/src/Handler/CurlFactory.php","Line":210,"message":"Failed to fetch discovery: cURL error 7: Failed to connect to cloud.hunter.camera port 443 after 1 ms: Could not connect to server (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://cloud.hunter.camera/hosting/discovery","exception":[],"CustomMessage":"Failed to fetch discovery: cURL error 7: Failed to connect to cloud.hunter.camera port 443 after 1 ms: Could not connect to server (see https://curl.haxx.se/libcurl/c/libcurl-errors.html) for https://cloud.hunter.camera/hosting/discovery"},"id":"67a77059412ca"}

Additional info

NextCloud VFS sync issue.zip

[kintaro1981]

in my case when a file get virtually synced the creation date changes to the time and date of the file sync completation, maybe can be related?

...on the web gui the dates are correct, the issue is only on macos finder.

Try to copy an "old" file in the sync folder and check if the creation date is actualized.
Take a look to the web gui too.

in this screenshoot you can see the behaviour:

[kintaro1981]

restarting the client reset the creation date to the right one:

[rexbron]

Updated to client 3.16.0 and server 30.0.0.6, still get the same behaviour.