this post was submitted on 08 Jun 2026
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Something’s up with federation from multiple instances (lemmy.ml)
submitted 1 day ago by Trying2KnowMyself@lemmy.ml to c/meta@lemmy.ml
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I have posts and comments on Hexbear from 4 hrs ago that don’t show up

I have a comment on Lemmygrad from 4 hrs ago that doesn’t show up

A recent series of posts from ml to other instances have almost no interaction locally. When viewed remotely, they have higher vote counts (no more comments to compare).

I haven’t extensively looked at the new feed to see if posts are outright missing, but I see the same general pattern spot checking posts that do appear: vote totals much lower than elsewhere, missing comments

I don’t see issues reported on https://phiresky.github.io/lemmy-federation-state/site

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[–] nutomic@lemmy.ml 2 points 23 hours ago (2 children)

Dont know whats going on with these comments, but federation status shows up to date in both directions:

[–] Trying2KnowMyself@lemmy.ml 1 points 19 hours ago (2 children)

internet-delenda-est

Yep. I checked that site and it definitely doesn’t show any issues, clearly everything is working.

Plenty of other folks are chiming in with the same experiences. It’s very clearly not just Hexbear. Is every other instance broken? Why are they federating just fine with each other, then?

https://lemmy.world/post/47958962

https://lemmy.ml/post/48512217

https://discuss.online/post/40968502

https://lemmy.ml/post/48508670

https://aussie.zone/post/33509821

https://lemmy.ml/post/48507829

https://piefed.blahaj.zone/c/womensstuff/p/792979/thoughts-on-this

https://lemmy.ml/post/48509886

https://startrek.website/post/40652133

https://lemmy.ml/post/48504964

https://lemmy.dbzer0.com/post/70286030

https://lemmy.ml/post/48512741

https://lemmy.ca/post/66154822

https://lemmy.ml/post/48503190

And yeah, that doesn’t even get into the posts that haven’t federated at all. I only went through a few pages of /new and I’m on posts that are hours old.

[–] nutomic@lemmy.ml 4 points 18 hours ago* (last edited 18 hours ago) (1 children)

Found the problem, I had commented out the Host header in nginx thinking it would not be necessary. Turns out I was wrong. Adding the header back in fixed the problem.

Big thanks for notifying about this!

[–] Trying2KnowMyself@lemmy.ml 2 points 14 hours ago

Thanks for fixing it!

[–] nutomic@lemmy.ml 4 points 18 hours ago

You're right, its also really noticable if you just compare the All feed, on lemmy.ml almost everything from local users. Most posts from other instances are missing. In the server logs are a lot of errors like this:

lemmy-1  |    0: lemmy_server::root_span_builder::HTTP request
lemmy-1  |            with http.method=POST http.scheme="http" http.host=0.0.0.0:10633 http.target=/inbox otel.kind="server" request_id=780b6573-2672-4361-87c2-6ece46e272ee
lemmy-1  |              at src/root_span_builder.rs:16
lemmy-1  | 2026-06-09T17:34:25.537123Z  WARN lemmy_server::root_span_builder: Unknown: Incoming activity has invalid signature

I thought at first that it would be related to the new 0.19.19 release, but downgrading to 0.19.18 doesnt fix the problem.

Issue link: https://github.com/LemmyNet/lemmy/issues/6581

[–] Muehe@lemmy.ml 1 points 20 hours ago (1 children)

OP already mentioned in the post body that the problem doesn't seem to show up on that site. Just compare the TopDay/Active sort of different instances, lemmy.ml is missing a whole lot of full posts by now, not just comments.

[–] nutomic@lemmy.ml 3 points 18 hours ago (1 children)

I found it now, posts are coming in normally again.

[–] Muehe@lemmy.ml 4 points 18 hours ago* (last edited 18 hours ago) (1 children)

Nice. Will old comments/votes also start coming in? I can see posts popping up, but many votes/comments still seem to be missing.

Edit:

Example of things still missing:

https://lemmy.ml/post/48501463
https://lemmy.world/post/47922684

Edit2:

Oh yeah, the post seems to be gaining stuff as time goes on, just added another upvote and a comment thread from 22 hours ago.

[–] nutomic@lemmy.ml 1 points 17 hours ago (1 children)

Old posts and comments will come in when we receive votes or replies for them. But missing votes won't be federated.

[–] Muehe@lemmy.ml 1 points 17 minutes ago

Hmm, yeah, the post I linked above is still missing some 50 comments, and most of the post and comment upvotes. Kind of interesting though that it acquired 92/148 comments (at time of writing), before you pushed the fix yesterday it had 2 upvotes and 0 comments. Guess the upvotes are just what has been added since then.

Would be nice if there was a contingency option for server admins for situations like this, no? Something like "Resynch federation events from to ", maybe limitable to certain instances/communities/posts. Not sure if that's possible with how the federation works currently, but if it is it would be a good feature I guess.