CSync failed to access and duplicate folders

Steps to reproduce
Can be reproduced, see below

Expected behaviour
Csync issue and duplicate folders

Actual behaviour
A few days ago we started to get CSync issues, like CSync failed to access a certain folder or folders and it looks like it is related a to a specific folder or maybe even several folders. At least that is where the issue starts. In this case a "reports" folder.
Sync failed to access: "https://xxx.xxx.xxx.xxx/owncloud/remote.php/webdav/Programs/_current/FL/Guld Breeze/reports"

In addition to this we have duplicate folders in the Gulf Breeze folder as well. When I access the owncloud web GUI I can see the "reports" folder and it allows me to delete it, but the folder comes back. If I try to rename the folder it says it does not exist anymore. So it looks like some parts of the database is corrupt?

We did the following troubleshooting so far:
* We run repair on the mysql database, yet this did not resolve it and no errors found.
* We run "sudo -u www-data php occ files:scan --all" yet this did not resolve the issue either
* We run "sudo -u www-data php occ maintenance:repair" yet this did not resolve the issue either

Any thoughts on this? On how to resolve this issue.

Server configuration
Operating system: Ubuntu 12.04.5 LTS
Web server: Apache 2.4.12
Database: Mysql 5.5.41
PHP version: PHP 5.5.23-1
ownCloud version (see ownCloud admin page): 9.1.4
Updated from an older ownCloud or fresh install: updated from older version from 8.0.16 to 8.1.12 to 8.2.10 to 9.0.8 to 9.1.4
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption): No

ownCloud log (data/owncloud.log)

Please paste possible errors in the following code block, see https://central.owncloud.org/t/how-to-find-webserver-or-oc-logfile-enable-php-logfile/808 for more info

Integrity status for oC9+

Login as admin user into your ownCloud and access
paste the results here.

No errors have been found.

We encountered this bug as well. It would be nice if someone could provide a temporary fix until it gets fixed in the new version. Please help.


if you think this is a bug then please report it (obviously :slight_smile:) to the bugtracker. There won't be any temporary fix in here as bugs won't be noticed and fixed based on reports here at the forums.

hey @markus007 @slide cross-posting my answer from https://github.com/owncloud/client/issues/5804:

It was opened some days ago in https://github.com/owncloud/core/issues/28018 and a fix is already in the making (https://github.com/owncloud/core/pull/28022), keep an eye in the core issue for updates.

Thanks for reporting! :wink:

The fix is done: https://github.com/owncloud/core/pull/28022

However this is only to prevent the breakage to happen in the first place.

Requires a repairs step to fix the broken filecache entries: https://github.com/owncloud/core/pull/28253

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