I feel like I have tried every suggestion to be found online but have not solved the problem. Adobe Support, at one point, looked in on our computer through a remote session and tried some things, but I haven't heard from them in a week.
To avoid confusion over platforms, here's how I will refer to everything: Lightroom Classic CC, the full-scale version with the interface similar to the pre-monthly subscription model, is LrC matching its icon; Lightroom, which has an interface similar to the website, will be CC; and lightroom.adobe.com will be Web.
When our office first started syncing, there were 16 photos that would permanently try to sync. They never showed up in Sync Activity under Preferences. Despite that, new imports and edits would always sync. We have 287,000+ photos in our catalog. Of those, we have 281,209 in the All Synced Photographs catalog of LrC. That same number is reflected on CC and Web. Our last photos to sync to the Web were imported on Sept. 4. I noticed the problem sometime in mid-October. I will do my best to recap all the efforts I've made since then, generally in chronological order:
Throughout this, when I check to see if I've fixed the sync issue, the number of photos trying to sync will appear in the LrC cloud icon, but nothing appears in the Sync Activity window under Preferences.
I'm in the process of updating the OS on the MacBookPro running CC so I can get to CC v4.
If that doesn't help, this is the last idea I haven't tried. Deleting collections is a non-starter for us; we have hundreds. So that step would get skipped. I'm also trying to avoid this because there is data added through Web in the captions field that has not synced to LrC. Losing that would require re-work on a couple hundred photos.
LrC is on version 10 on a Mac Pro running OS 10.15.7. We access CC version 3.4 on a MacBook Pro running OS 10.13.6. Several people on staff work with our photos, but we import exclusively through LrC and CC is only on one computer - all logged in under the same email address. We never upload/import to our catalog via any mobile device. We do not have any videos in any Lightroom platform. There are no deleted photos in CC or Web.
I'll add that I sent diagnostic logs to Adobe Support on two separate occasions and never heard from them whether those had any helpful information.
Following your post!
"Our last photos to sync to the Web were imported on Sept. 4."
And any photos Imported to LrC since then are in Collections marked to Sync? Correct?
And ALL your photos in the Catalog are also in Collections marked to Sync? Is that so?
When you swapped Catalogs (from a Backup)- were you asked if you want to 'Change to this Catalog to Sync with the Cloud'?
Wobert, thanks for checking in. Here are my responses.
New imports are in Collections that were initially marked to sync. I turned that off so we wouldn't have to see the spinning blue arrows (and a pending sync seems to slow the software down a bit). If I were to mark the Collection to sync again, they will not sync. I have tried this.
We have more than 287K photos total in our Catalog. Of those, 281,209 are in Collections marked to sync and did so prior to Sept. 4.
When I swapped Catalogs, I don't recall being prompted with the question you mentioned. However, the previous Catalog was not syncing new imports either.
@mattwatt With 281,000 photos synced, changing the Catalog would be a major 'slow-down' as the 'new' catalog will attempt to match up the Cloud (Smart Previews) with the all the Originals in the hard-drive. Follow the understanding that we can only sync 'one' Classic Catalog and do not change it!
Have you tried adding new imports to a new Collection (not an extablished one), and then mark for sync?
Yes, I have added new imports to a new collection and marked for sync. It did not work.
I'll also clarify, the previous catalog was not syncing either, so the change is not the cause here. My intial post said syncing wasn't working prior to updating LrC to v10, but I should have been more clear about the catalog status. We only switched to a backup catalog when Adobe Support got involved.
I am having the same issue, no syncing at all. LR gets stuck in 652 while syncing. When reviewing the Sync Activity it shows no file names, nothing to sync, pending, etc.
I have tried to rebuild the lrdatasync folder several times. I deleted and let LR create it again. No luck, that doesn't fix the problem.