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Question about Defederation that I am stuck on (lemmy.world)

submitted 1 year ago by FeelzGoodMan420@lemmy.world to c/general@lemmy.world

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Using Beehaw's /c/gaming community as an example: Why am I still seeing some new posts by beehaw users? Shouldn't these not be showing up? What am I misunderstanding? Are there now 2 /c/gaming communities? The "real" one on beehaw and then the copy on lemmy.world that split off once defederation happened? If so, why is there a beehaw user making posts here?

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[–] ipha@lemmy.world 8 points 1 year ago (1 children)

It's an artifact of how caching and one sided defederation works(beehaw has defederated with lemmy.world, but lemmy.world hasn't defederated beehaw)

When beehaw defederated, they've done two things:

blocked lemmy.world users from participating in their community
blocked beehaw users from particpating in lemmy.world

But lemmy.world doesn't know any of this. So it continues to sync /c/gaming (read access to communities isn't blocked by defederation) and you'll see new posts and new comments.

If you try and comment though, it gets weird. Your comment will show up in lemmy.world's cache of the community, but when it gets sent to beehaw it will be rejected. So now your comment only exists in lemmy.world. Local users will see it, but beehaw won't and other instances won't since they're syncing the 'real' copy from beehaw directly.

[–] FeelzGoodMan420@lemmy.world 1 points 1 year ago* (last edited 1 year ago) (1 children)

Ah ok this checks out. So as a Lemmy.World user, I am still going to see all of the new posts in those communities. I just can't comment? I could have sworn that the documentation stated that we wouldn't be receiving any new content (posts/comments) from Beehaw. So you are saying it is just a read-only? It does seem that we aren't picking up all of the new posts from /c/gaming@beehaw.org. If you actually go to beehaw.org, there are way more new posts. Do you know why this is? There are also comments on the beehaw version but not the lemmy.world version. Aren't you saying we should be seeing comments?

[–] ipha@lemmy.world 2 points 1 year ago

That may be related to our general issues with federation. Things aren't always syncing properly -- see here for more known issues: https://lemmy.world/post/15786

[–] SlowNPC@kbin.social 4 points 1 year ago

Beehaw blocked lemmy.world, but lemmy.world didn't block Beehaw. Therefore, lemmy.world still brings in new posts from Beehaw that you can see. Any comments you make on those posts will not be accepted by Beehaw, whose version of the thread is the "official" version that other instances reference, so your comments will only exist on lemmy.world's local copy of those posts.

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