CI is okay. Let me review this.

@rullzer What about a cleanup repair step (that can run in live mode) to remove previews of non-existing files?

@rullzer 🏓 backport is pending

@rullzer 🏓

Backport in #6114

Looks like this is broken again in 14.0.0 Beta 3. Can we reopen?

@fdoumet yes we changed the way it works. There is now a background job doing the cleanup so it is asynchronous. This means it is less likely to run into timeouts.

From this line in BackgroundCleanupJob:

$qb->expr()->castColumn('a.name', IQueryBuilder::PARAM_INT), 'b.fileid'

it looks like only previews with a fileId as a name will get cleaned. Other previews with names such as 128-128-max.jpg will not get deleted. Is that accurate?

No. It looks for folder names. The folder names of the previews are fileids

Thank you! How can i easyly add the Changes to my nextcloud?

Updating to any of the recent Nextcloud versions (15, 16 or 17) will automatically bring the fix.