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Anyone having issues with Lemmy self hosting? (lemmy.world)

submitted 7 months ago* (last edited 7 months ago) by [email protected] to c/[email protected]

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My main account is [email protected]. However, as of roughly ~~24-hours ago~~ (it seems this has been going on since March 10th and gotten worse since) it seems like the server has stopped properly retrieving content from lemmy.world.

It's been running smoothly for well over 9 months, and (I think) working fine for content coming in from other instances. So I'm curious if anyone else experienced anything strange with lemmy.world federation recently?

Setup Description

The server flow in my case is as follows:

[Public Internet] <-> [Digital Ocean Droplet] <-> [ZeroTier] <-> [Physical Machine in my Basement (HW Info)]

The Digital Ocean droplet is a virtual host machine that forwards requests via nginx to the physical machine where a second nginx server (running the standard lemmy nginx config) then forwards the request to the lemmy server software itself.

Current Status

Lemmy Internal Error

I've found this is my lemmy logs:

2024-03-24T00:42:10.062274Z  WARN lemmy_utils: error in spawn: Unknown: Request limit was reached during fetch
   0: lemmy_apub::objects::community::from_json
             at crates/apub/src/objects/community.rs:126
   1: lemmy_apub::fetcher::user_or_community::from_json
             at crates/apub/src/fetcher/user_or_community.rs:87
   2: lemmy_server::root_span_builder::HTTP request
           with http.method=POST http.scheme="http" http.host=social.packetloss.gg http.target=/inbox otel.kind="server" request_id=688ad030-f892-4925-9ce9-fc4f3070a967
             at src/root_span_builder.rs:16

I'm thinking this could be the cause ... though I'm not sure how to raise the limit (it seems to be hard coded). I opened an issue with the Lemmy devs but I've since closed it while gathering more information/making sure this is truly an issue with the Lemmy server software.

Nginx 408 and 499s

I'm seeing the digital ocean nginx server reporting 499 on various "/inbox" route requests and I'm seeing the nginx running on the physical machine that talks directly to lemmy reporting 408 on various "/inbox" route requests.

There are some examples in this comment: https://lemmy.world/comment/8728858

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[–] [email protected] 1 points 7 months ago

Could be postgres-related. Federation is only "jammed" if the source instance thinks your instance is having an issue because it takes too long to respond. Maybe enabling slow query log on postgres and then reviewing that log could point you in the right direction.