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Infinite sync loop

mike_3

Member
Joined
Jul 31, 2019
Messages
43
Lightroom Version
11.4
Operating System
  1. macOS 12 Monterey
I recently uploaded about 4000 new images into my library. Everything synced fine until the last 115 images or so, and everyday it says it's syncing about this many images, and when it gets down to around 11 or so it seems to get stuck, and then the next day I'll see the count at 115 again. meanwhile, the latest collection i made isn't syncing to the cloud either so i have a feeling this is related. any ideas?
 
Joined
Sep 29, 2007
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Isle of Wight, UK
Lightroom Experience
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It does sound like it's stuck on something. Can you grab a screenshot of Preferences > Lightroom Sync tab with the Sync Activity section opened at the bottom? That might offer some clues.
 

mike_3

Member
Joined
Jul 31, 2019
Messages
43
It does sound like it's stuck on something. Can you grab a screenshot of Preferences > Lightroom Sync tab with the Sync Activity section opened at the bottom? That might offer some clues.
I have been on with Adobe Tech support multiple times to no avail. I've rebuilt my sync data multiple times to no avail. Every time I start the sync it motors along and then after a while (not always at the same count) it literally slows to a CRAWL. To eliminate all variables, I left LR CC on ALL DAY since 7 am to 5 pm with nothing else running in the background, and this is ALL that happened with a 450 mb/s down / 20 mb/s up connection!
1656459555015.png
 

mike_3

Member
Joined
Jul 31, 2019
Messages
43
I have been on with Adobe Tech support multiple times to no avail. I've rebuilt my sync data multiple times to no avail. Every time I start the sync it motors along and then after a while (not always at the same count) it literally slows to a CRAWL. To eliminate all variables, I left LR CC on ALL DAY since 7 am to 5 pm with nothing else running in the background, and this is ALL that happened with a 450 mb/s down / 20 mb/s up connection!
View attachment 18895
I forgot to mention that I have 205k images in my library, so this is not even close to being done. What's weird is that it does seem to make progress but at an EXTREMELY SLOW pace, like maybe 100 photos every 15-30 min!
 
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Rebuilding sync data literally tells it to compare every photo in the cloud against every photo in your catalog so it can take days with that many photos. So I would leave it open and wait for it to sync.

Beyond that, do you have any shared albums that you can't afford to break the links to? Because sometimes it's simplest to empty the cloud (via the web interface > avatar > Account Info > Delete Lightroom Library) and let Classic sync everything up clean.
 

mike_3

Member
Joined
Jul 31, 2019
Messages
43
Thx so much. I unfortunately have hundreds of collections. Do you know if the slowness is just due to the comparisons vs. due to limitations of upload bandwidth? I have a 450 down/20 up connection which ought to be plenty fast unless LR CC is actually uploading full res images which I highly doubt. The good news is that after turning off my time machine backup (which may have been slowing these down), my count went from 136k to 14k. let's see if it finishes this time. the whole thing that started these rebuild attempts was that it was stuck on the last couple and not updating a new sync collection.
 
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Hundreds of collections? Or hundreds of collections that you've given others links for? Only the latter would be an issue, because the links would change when reuploading them.

That's good that the count's changed so well, hopefully it'll complete if you just leave it running.
 

mike_3

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Jul 31, 2019
Messages
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Ah I misunderstood. Don't have that many shared collections.

The good news is that my sync count is down to tag ends like 18 photos or so but the bad news it that whenever it looks like it's about to finish, the count jumps back to 100+. Seems like it's in some kind of loop again. This is exactly what spurred me to do the rebuilds in the first place.
 
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Oh that’s ok, hold fire, it goes up and down for a while before it completes. I’m not certain exactly what it’s doing when it’s doing that, but it’s normal.
 

mike_3

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Jul 31, 2019
Messages
43
Well, now I'm noticing a bunch of sync errors in the Sync Activity log in OLD folders saying that the issue errors are "Metadata" oriented. Bizarre. I'm going to try to restore from time machine backup those folders to see if it frees up the syncing.
1656595602676.png
 

mike_3

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Jul 31, 2019
Messages
43
Adobe Tech Support said to let the sync happen as long as the folders in the sync details keep changing. it seemed to start in my old folders (1989-1990) and eventually got up to 2017 last night. But this am, it's back to 1997! I'm wondering if this sync will EVER finish?!
 

mike_3

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Jul 31, 2019
Messages
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Victoria, if I delete lightroom library as you suggest and resync cleanly from scratch, will that take longer or the same time as a rebuild sync data? I'm almost ready for the nuclear option. this has been going on for over a week now.
 

iwaddo

Member
Joined
Apr 13, 2020
Messages
92
@mike_3

I too have had many problems with syncing seemingly getting into an endless loop. I restored a few times and syncing seems to settle down for a while but eventually I find that I end up with a small batch that just will not sync - though leaving it on and trying for hours does seem to get there eventually.

I am curious, so do you mind if I ask about your use case for syncing > 200,000 images from Lightroom Classic to the Adobe Cloud? I only have half that and only sync a fraction at a time that I want to have on my iPad for showing people or occasional editing. I cannot image trying to sync my whole catalogue, even though it is halve the size of yours.

Thank you for your help.
 

mike_3

Member
Joined
Jul 31, 2019
Messages
43
LR Mobile has proven to be an amazing solution for what I wanted: to be able to recall any image from any year or major event (which is how I've categorized my library). That's why the sync collection is so massive.

From my countless hours with Adobe tech support this time around, as long as the sync is making progress and not showing errors, leave it on no matter how long it takes. For me, since rebuilding sync data, it took probably 8-9 DAYS. What's deceiving about the reported progress is that once of the big initial sync numbers go down to zero, LR seems to go through a second phase of small-batch syncs that are doing metadata comparisons or something. I could tell it was making progress by the date folders in my library. It does a couple passes sometimes. What I thought was an infinite loop wasn't actually a loop after all, although in the past, I HAVE gotten stuck in a loop which was hanging everything up on a few problem images which I had to delete. Hope that helps!
 
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Ah good. Yes, that sounds about right. They could do with improving the activity reports really.
 
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