[Bug]: Temporary files break desktop app file synchronization

[rbaldasso]

⚠️ 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

Temporary files (starting with special character) breaks file sinchronization on Windows client app when VFS is enabled

This issue appears to be related to #4410
and #4246

Steps to reproduce

Steps to reproduce the behavior:

1. Enable VFS and have Nextcloud syncing your local directories
2. Trigger the creation of temporary files on one of those folders. For example open an Excel file and start editing it
3. Edit the file but don't save it, to trigger the temporary file creation
4. The Nextcloud app will stop synchronizing files and from now only displays "Checking for folder changes"

Expected behavior

A temporary file should not break file synchronization.

Which files are affected by this bug

$CONTROLE DE FATURAMENTO BM07.xlsx

Operating system

Windows

Which version of the operating system you are running.

Windows 11

Package

Official Windows MSI

Nextcloud Server version

29.0.8

Nextcloud Desktop Client version

3.15.3

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

Fresh desktop client install

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

Additional info

2025-01-16 11:32:05:583 [ warning nextcloud.sync.vfs.cfapi.wrapper C:\Users\User\AppData\Local\Temp\windows-27802\client-building\desktop\src\libsync\vfs\cfapi\cfapiwrapper.cpp:841 ]: Couldn't set pin state (4) for "C:\Users\Thiarles Porta\Nextcloud\Administrativo\Contratos\656.2023 - (XXXXX)\BOLETINS DE MEDIÇÃO\BM07 JUL-24\$CONTROLE DE FATURAMENTO BM07.xlsx" with recurse mode 1 : "Identificador inválido."
2025-01-16 11:32:05:583 [ warning nextcloud.gui.folder C:\Users\User\AppData\Local\Temp\windows-27802\client-building\desktop\src\gui\folder.cpp:604 ]: Could not set pin state of "Administrativo/Contratos/656.2023 - (XXXXX)/BOLETINS DE MEDIÇÃO/BM07 JUL-24/$CONTROLE DE FATURAMENTO BM07.xlsx" to excluded
[.....]
after this then we start seeing:
2025-01-16 11:37:12:506 [ warning nextcloud.gui.shellextensions.server C:\Users\User\AppData\Local\Temp\windows-27802\client-building\desktop\src\gui\shellextensionsserver.cpp:108 ]: Record not found in SyncJournal for: "Administrativo/Contratos/656.2023 - (XXXXX)/BOLETINS DE MEDIÇÃO/BM06 JUN-24/206_23_FARROUPILHA_SES_.pdf"
2025-01-16 11:37:12:506 [ warning nextcloud.gui.shellextensions.server C:\Users\User\AppData\Local\Temp\windows-27802\client-building\desktop\src\gui\shellextensionsserver.cpp:108 ]: Record not found in SyncJournal for: "Administrativo/Contratos/656.2023 - (XXXXX)/BOLETINS DE MEDIÇÃO/BM06 JUN-24/208_23_RIO_GRANDE_SES_.pdf"
2025-01-16 11:37:12:509 [ warning nextcloud.gui.shellextensions.server C:\Users\User\AppData\Local\Temp\windows-27802\client-building\desktop\src\gui\shellextensionsserver.cpp:108 ]: Record not found in SyncJournal for: "Administrativo/Contratos/656.2023 - (XXXXX)/BOLETINS DE MEDIÇÃO/BM06 JUN-24/206_23_FARROUPILHA_SES_.pdf"

20250116_1046_nextcloud.log.5.zip

[mgallien]

can you share the list of apps installed on your server ?

[rbaldasso]

Hi, we don’t have any apps. It’s a vanilla install with around 30 users and 400 GB of files. We have imaginary and clamav installed. What I found odd though, is that Imaginary has 1000s of threads on the server — albeit only a few of them using cpu, seems like they are getting stuck and not exiting after completing the task. Em seg., 20 de jan. de 2025 às 18:39, Matthieu Gallien < ***@***.***> escreveu:

…

can you share the list of apps installed on your server ? — Reply to this email directly, view it on GitHub <#7776 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEVFXIY34XN4M37HKDWV7ML2LVUIXAVCNFSM6AAAAABVRAG6KGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDMMBTGI3DENZUGE> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[mgallien]

sorry if I was not clear enough
@rbaldasso
I would need the output of: occ app:list

[rbaldasso]

sorry if I was not clear enough @rbaldasso I would need the output of: occ app:list

Hi @mgallien , sorry about that. Here's the output:

root@dedicado-tsa:~# sudo docker exec --user www-data -it nextcloud-aio-nextcloud php occ  app:list
Enabled:
  - activity: 3.0.0
  - admin_audit: 1.20.0
  - app_api: 4.0.3
  - bruteforcesettings: 3.0.0
  - calendar: 5.0.9
  - circles: 30.0.0
  - cloud_federation_api: 1.13.0
  - comments: 1.20.1
  - contacts: 6.1.3
  - contactsinteraction: 1.11.0
  - dashboard: 7.10.0
  - dav: 1.31.1
  - deck: 1.14.3
  - federatedfilesharing: 1.20.0
  - federation: 1.20.0
  - files: 2.2.0
  - files_downloadlimit: 3.0.0
  - files_pdfviewer: 3.0.0
  - files_reminders: 1.3.0
  - files_sharing: 1.22.0
  - files_trashbin: 1.20.1
  - files_versions: 1.23.0
  - firstrunwizard: 3.0.0
  - logreader: 3.0.0
  - lookup_server_connector: 1.18.0
  - nextcloud-aio: 0.7.0
  - nextcloud_announcements: 2.0.0
  - notes: 4.11.0
  - notifications: 3.0.0
  - notify_push: 1.0.0
  - oauth2: 1.18.1
  - password_policy: 2.0.0
  - photos: 3.0.2
  - privacy: 2.0.0
  - provisioning_api: 1.20.0
  - recommendations: 3.0.0
  - related_resources: 1.5.0
  - serverinfo: 2.0.0
  - settings: 1.13.0
  - sharebymail: 1.20.0
  - support: 2.0.0
  - survey_client: 2.0.0
  - systemtags: 1.20.0
  - tasks: 0.16.1
  - text: 4.1.0
  - theming: 2.5.0
  - twofactor_backupcodes: 1.19.0
  - twofactor_totp: 12.0.0-dev
  - user_status: 1.10.0
  - viewer: 3.0.0
  - weather_status: 1.10.0
  - webhook_listeners: 1.1.0-dev
  - workflowengine: 2.12.0
Disabled:
  - encryption: 2.18.0
  - files_external: 1.22.0
  - suspicious_login: 8.0.0
  - twofactor_nextcloud_notification: 4.0.0
  - user_ldap: 1.21.0