Earlier today I made a post on Mastodon and made it post to Lemmy as well, by @ing the community I wanted it to appear in. Here’s a link to the post on Mastodon, and here’s how it showed up on Lemmy. At first, everything seemed to work fine.

But something I noticed is that, though the Lemmy comments were visible to me on Mastodon, the reverse was not true: most of the Mastodon replies were not visible on Lemmy. So there seems to have been some federation issues there.

So my question is, does anyone know what caused this and if so how I can fix it?

you are viewing a single comment's thread
view the rest of the comments

[–] julian@activitypub.space 9 points 23 hours ago* (last edited 23 hours ago) (3 children)

> @a_gee_dizzle@lemmy.ca said in Mastodon not federating to Lemmy?: > > So my question is, does anyone know what caused this and if so how I can fix it?

Mastodon doesn't know to send replies to the community for distribution to the rest of the threadiverse.

Long story short if you're not on the same instance as the community, Mastodon replies to you won't make it to the rest of the threadiverse.

I experimented with a hack to see if I could fix this. NodeBB works around this by including a hidden mention to the community that Mastodon will then pre-fill in the text box, and then the reply will make it in successfully. If you have a Mastodon account try to reply to this comment, the community will be pre-filled as a mention.

Piefed, Lemmy, and Mbin will need to do this.

Does it work? Yes

Are we supposed do it? Technically no, it's easier to blame Mastodon for not doing it right.

Should we do it? Probably, yes.

@rimu@piefed.social @nutomic@lemmy.ml @bentigorlich@gehirneimer.de @melroy@mastodon.melroy.org I tested this. It works perfectly fine. We can implement this today and remove it when Mastodon supports threadiverse conversations better (I'll try to make that happen.)

[–] pseudo@jlai.lu 1 points 13 hours ago

Long story short if you’re not on the same instance as the community, Mastodon replies to you won’t make it to the rest of the threadiverse.

Oh... That explains a lot of. Thank you for sharing the cause and the solution (^_^)

[–] nutomic@lemmy.ml 1 points 15 hours ago (1 children)

Good idea, adding this to Lemmy.

https://github.com/LemmyNet/lemmy/pull/6409

[–] liaizon@social.wake.st 1 points 14 hours ago

@nutomic @julian oh wow thats great to hear. Gotta love a hack

[–] rimu@piefed.social 1 points 22 hours ago (1 children)

Sounds good to me!

[–] nutomic@lemmy.ml 0 points 12 hours ago (1 children)

Did you receive my email from last Thursday? Seems there might be some delivery problem.

[–] julian@activitypub.space 1 points 11 hours ago (1 children)

About batched votes? Yeah I did, just haven't responded yet 👍

[–] nutomic@lemmy.ml 1 points 6 hours ago (1 children)

I was asking Rimu, but good to get confirmation that it's working for you at least :)

[–] rimu@piefed.social 2 points 6 hours ago

Sorry - email is the channel which adds things to my todo list so when I get too busy I become avoidant about it. Just opening Thunderbird makes me a little anxious! "Ahh, yes, the app which brings more pain, here we go again"