Why is serveral instances down simultaneously? Is it just me?

OhNoMyInstanceIsDown@lemm.ee to Fediverse@lemmy.world – 99 points –

Can't post images because they're too big so here's imgur: https://imgur.com/a/Fm52ZTB

Edit: lemmy.ml and lemmy.world seem to have come back, I'm just a bit worried that it's another one of those hacks.

Edit 2: Most of those I've tried came back. reddthat.com and sh.itjust.works seems to still be down

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Not saying it was a coordinated attack (per your edit), but anything popular is a prime target for various types of attacks, especially easier stuff like DDoS. But with every attack, the developers and various admins/owners of instances learn something new and how to mitigate it. So while it's annoying, it's just as much a blessing as it is a curse - better to patch things quickly than leave an exploitable hole open for who knows how long with access to who knows what.

I run my own single user instance, and it was down as well. Not sure why someone would target a single user instance. Not ruling it out, but it seems unlikely.

All instances using federation are publicly visible and it's simple to script attacking all of us.

However it's even easier to just attack Lemmy.world since almost everyone is there and it will have maximum disruption on everyone. People have centralized on one server. :)

But it's just some denial of service attacks right now. Eventually they probably get tired of it too. There is no point to it really.

I’m thinking about doing this for making my main account, since I never look at my local feed anyway.

How’s the experience? And do you know of a good starting point?

The experience is pretty good except for discoverability of new communities. My Subscribed and All feeds are the same. I started with the official local development docker-compose file and massaged it into place for my setup.

Ah, yeah that could be problematic. Maybe I’ll hold off until accounts can be migrated, and port this one over to expand the content. Start subbing to everything I even tangentially like 😅. Tho maybe they will fix the discoverability issue - sounds like it happens kinda a lot.

Thanks for replying!

Yeah, for me too. Seems like whole fediverse has issues, problems with loading posts etc. at least for me

Same here, sh.itjust.works is currently down:

https://www.isitdownrightnow.com/sh.itjust.works.html

sh.itdont.work

Which is not explained by .ml fiasco, it is worth pointing out.

There is a GitHub issue on it and I experienced the exact same thing with my instance. A timeout occurs and the only way to fix it is to restart it seems. Like everyone else, it's strange that it all happened at the same time.

It's not that strange. A timeout occurs on several servers overnight, and maybe a bunch of Lemmy instances are all run in the same timezone, so all their admins wake up around the same time and fix it.

Well it's a timeout, so by fixing it at the same time the admins have "synchronized" when timeouts across their servers are likely to occur again since it's tangentially related to time. They're likely to all fail again around the same moment.

It's kind of similar to the thundering herd where a bunch of things getting errors will synchronize their retries in a giant herd and strain the server. It's why good clients will add exponential backoff AND jitter (a little bit of randomness to when the retry is done, not just every x^2 seconds). That way if you have a million clients, it's less likely that all 1,000,000 of them will attempt a retry at the extract same time, because they all got an error from your server at the same time when it failed.

Edit: looked at the ticket and it's not exactly the kind of timeout I was thinking of.

This timeout might be caused by something that's loosely a function of time or resources usage. If it's resource usage, because the servers are federated, those spikes might happen across servers as everything is pushing events to subscribers. So, failure gets synchronized.

Or it could just be a coincidence. We as humans like to look for patterns in random events.

wrong issue lol

This probably makes more sense although the issue I was experiencing earlier had similar logs as the issue I linked and others have commented on it too around the same time. I'm guessing they're related.

The original issue is just a symptom of all database threads being tied up. People just don't know how to follow an error message to the root cause.

The real source of the issue is db locking from triggers and cascading deletes on a major user change.

My report in https://github.com/LemmyNet/lemmy/issues/3649 has the offending query.

I had that too. Tried multiple instances myself. Nice username btw.

Another DDOS? There's been a few of them lately

Probably a sign that the platform is getting more popular, nobody wants to DDoS a place without any users

It seem like it's a bug which spread through more than a ddos.

Restarting the backend of an instance should fix the problem otherwise web users could try clearing the cookies

I get that message pretty much every time I visit a Community that I haven't visited before (or maybe one that no-else from my instance has visited before).

It get fixed on a refresh (like the message suggests), so I'm guessing it's a problem with time-out settings when my instance has to pull in a lot of new data.

I was facing issues with lemmy.world too, now seems to be okay

For those affected by these outages in the larger servers and who'd be interested in helping spread around: my instance will be free for the first 250 registrations. There are ~220 spots still left.

The catch is that my registration process is (purposefully) difficult to avoid squatters/spammers/bots. So you need to do one of the following:

  • sign up to my main portal site first. If you do that, please give your email address so that I can send a confirmation with the first credentials.
  • signup to communick.news directly, and send me a DM on reddit (/u/rglullis), or here, or on mastodon) with the username you used to signup. If you don't send the DM, I will assume it's a bot and will deny the application.

Edit: downvoters, please don't be so cynical. I've been offering this even before the reddit blackout. What is so bad about it?

That’s the problem with the fediverse. They tend to go down a lot. Same thing happens with mastodon servers.

When vlemmy.net disappeared (and it was the only one I had registered to), I registered at lemmy.world, sh.itjust.works, and while I was trying to register at lemmy.ML, I registered at feddit.NL by mistake. (then I requested a login at lemmy.ml, but never got a confirmation).

At the moment feddit.NL is the only instance I have a login at that I can use.

That was a happy mistake :-)

Maybe the problem is me. If feddit.nl goes down, I'll know for sure.

Overloaded servers (cpu,ram,disk), not enough bandwidth, endless possibillities...

Occuring on multiple instances at the same time? Unlikely.

idk, my server is in good shape 😅 But could be some bug in code which overload them.