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Missing comments from subscribed community on another instance? (jamie.moe)

submitted 3 years ago* (last edited 3 years ago) by Jamie@jamie.moe to c/selfhosted@lemmy.world

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I do the majority of my Lemmy use on my own personal instance, and I've noticed that some threads are missing comments, some large threads, even large quantities of them. Now, I'm not talking about comments not being present when you first subscribe/discover a community to your instance, in this case, I noticed it with a lemmy.world thread that popped up less than a day ago, very well after I subscribed.

At the time of writing, that thread has 361 comments. When I view the same thread on my instance, I can see 118, that's a large swathe of missing content for just one thread. I can use the search feature to forcibly resolve a particular comment to my instance and reply to it, but that defeats a lot of the purpose behind having my own instance.

So has anyone else noticed something similar happening? I know my instance hasn't gone down since I created it, so it couldn't be that.

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[–] darmok@darmok.xyz 1 points 3 years ago

I've noticed something similar on my instance in some cases as well. Nothing obvious logged as errors either. It just seems like the comment was never sent. In my case cpu is minimal so it doesn't seem like a resource issue on the receiving side.

I suspect it may be a resource issue on the sending side. Potentially, not able to keep up with the number of subscribers. I know there was some discussion from the devs around the number of federation workers needing to be increased to keep up, so another possibility there.

It's definitely problematic though. I was contemplating implementing some kind of resync this entire post and all comments via the Lemmy API to get things back in sync. But, if it is a sending server resource issue, I'm also hesitant to add a bunch more API calls to the mix. I think some kind of resync functionality will be necessary in the end.