Server reporting file checksum errors after upgrading to 10.9

[Andrej_Rehak]

Hello

I have been running ownCloud server instance for quite some time. And i have been using ownCloud Windows desktop sync client.

Recently i made a successful upgrade with all the necessary backups, and then i have performed a rescan of data folder.

Since then i am experiencing local folder sync issues. Some files are producing error messages:
Downloaded file does mot match the checksum, it will be resumed.

You can see the error in attached PNG image.

Please if you could help me figure out what is the problem?

Thank you!

Steps to reproduce

1.Made backups
2.Upgraded ownCloud server instance
3.Rescanned ownCloud data directory using occ
4.Run ownCloud sync client on windows

Expected behaviour

Synchronization with local PC folders without problems

Actual behaviour

Synchronization of certain files (predominantly) images is producing error messages as in attached PNG file.

Server configuration

Operating system: Debian 10

Web server: Apache

Database: Mysql

PHP version: 7.4

ownCloud version: 10.9

Updated from an older ownCloud or fresh install: 10.8

Where did you install ownCloud from: Official owncloud repository.

Signing status (ownCloud 9.0 and above):

Integrity check:

No errors have been found.

The content of config/config.php:
server configuration

List of activated apps:

Enabled:
  - activity:
    - Version: 2.7.0
    - Path: /var/www/owncloud/apps-external/activity
  - announcementcenter:
    - Version: 1.2.2
    - Path: /var/www/owncloud/apps-external/announcementcenter
  - brute_force_protection:
    - Version: 1.1.0
    - Path: /var/www/owncloud/apps-external/brute_force_protection
  - checksum:
    - Version: 0.3.5
    - Path: /var/www/owncloud/apps-external/checksum
  - comments:
    - Version: 0.3.0
    - Path: /var/www/owncloud/apps/comments
  - configreport:
    - Version: 0.2.0
    - Path: /var/www/owncloud/apps/configreport
  - customgroups:
    - Version: 0.6.2
    - Path: /var/www/owncloud/apps-external/customgroups
  - dav:
    - Version: 0.7.0
    - Path: /var/www/owncloud/apps/dav
  - diagnostics:
    - Version: 0.1.4
    - Path: /var/www/owncloud/apps-external/diagnostics
  - drawio:
    - Version: 0.0.9
    - Path: /var/www/owncloud/apps-external/drawio
  - extract:
    - Version: 1.2.4
    - Path: /var/www/owncloud/apps-external/extract
  - federatedfilesharing:
    - Version: 0.5.0
    - Path: /var/www/owncloud/apps/federatedfilesharing
  - files:
    - Version: 1.5.2
    - Path: /var/www/owncloud/apps/files
  - files_clipboard:
    - Version: 1.0.3
    - Path: /var/www/owncloud/apps-external/files_clipboard
  - files_external:
    - Version: 0.8.0
    - Path: /var/www/owncloud/apps/files_external
  - files_mediaviewer:
    - Version: 1.0.5
    - Path: /var/www/owncloud/apps/files_mediaviewer
  - files_pdfviewer:
    - Version: 1.0.1
    - Path: /var/www/owncloud/apps-external/files_pdfviewer
  - files_sharing:
    - Version: 0.14.0
    - Path: /var/www/owncloud/apps/files_sharing
  - files_texteditor:
    - Version: 2.4.1
    - Path: /var/www/owncloud/apps-external/files_texteditor
  - files_trashbin:
    - Version: 0.9.1
    - Path: /var/www/owncloud/apps/files_trashbin
  - files_versions:
    - Version: 1.3.0
    - Path: /var/www/owncloud/apps/files_versions
  - firstrunwizard:
    - Version: 1.2.0
    - Path: /var/www/owncloud/apps/firstrunwizard
  - gallery:
    - Version: 16.1.2
    - Path: /var/www/owncloud/apps-external/gallery
  - guests:
    - Version: 0.9.3
    - Path: /var/www/owncloud/apps-external/guests
  - impersonate:
    - Version: 0.5.1
    - Path: /var/www/owncloud/apps-external/impersonate
  - market:
    - Version: 0.6.2
    - Path: /var/www/owncloud/apps/market
  - nextbackup:
    - Version: 21.1.1
    - Path: /var/www/owncloud/apps-external/nextbackup
  - nipp-han-theme:
    - Version: 1.0.0
    - Path: /var/www/owncloud/apps-external/nipp-han-theme
  - notifications:
    - Version: 0.5.4
    - Path: /var/www/owncloud/apps/notifications
  - onlyoffice:
    - Version: 7.3.1
    - Path: /var/www/owncloud/apps-external/onlyoffice
  - openidconnect:
    - Version: 2.1.0
    - Path: /var/www/owncloud/apps-external/openidconnect
  - systemtags:
    - Version: 0.3.0
    - Path: /var/www/owncloud/apps/systemtags
  - templateeditor:
    - Version: 0.4.0
    - Path: /var/www/owncloud/apps-external/templateeditor
  - updatenotification:
    - Version: 0.2.1
    - Path: /var/www/owncloud/apps/updatenotification
Disabled:
  - encryption:
    - Path: /var/www/owncloud/apps/encryption
  - federation:
    - Path: /var/www/owncloud/apps/federation
  - files_antivirus:
    - Path: /var/www/owncloud/apps-external/files_antivirus
  - firewall:
    - Path: /var/www/owncloud/apps-external/firewall
  - metrics:
    - Path: /var/www/owncloud/apps-external/metrics
  - provisioning_api:
    - Path: /var/www/owncloud/apps/provisioning_api
  - user_shibboleth:
    - Path: /var/www/owncloud/apps-external/user_shibboleth

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: Vivaldi

Operating system: Windows

Logs

ownCloud log (data/owncloud.log):

log file

[eneubauer]

@Andrej_Rehak

Please if you could help me figure out what is the problem?

Thank you!

Not sure how this happens exactly, however there is a command:

occ files:checksum:verify -r

You can read more about it here:

Using the occ Command

[Andrej_Rehak]

Thank you very much.

I solved the problem by moving the folder containing all the files that had synchronisation problems out of the directory structure that was marked for synchronisation and moving the folder back in. This caused the files to be deleted on the server and uploaded back again.

You can close this topic.