websockets doesn't connect on machine

[szindel]

Hey all,

I have an app that ran many months flawlessly. Until 10 Nov 2025, since than, a websocket I use in the app no longer reaches the on_open and it seems that the websocket simply is never opened..

I only see the error: websocket._exceptions.WebSocketConnectionClosedException: socket is already closed. which comes from the ping mechanism.

However when I ssh into the machine using fly console and run the code manually, it does work.. I attempted switching ip addresses and switched regions and machines already but nothing seems to work..

Any suggestions? I made no changes to the code when it stopped working..

[PeterCxy]

Is it possible to share the name of your app so we can take a look? I’m not aware of anything about Websockets we have changed recently, but it’s always possible that there’s some unrelated changes that had weird interactions with your app specifically.

[szindel]

Hey Peter, thanks for your help. The apps name is botfolio.

[PeterCxy]

It looks like this isn’t related to websockets but rather IPv6 connectivity issues on the host. I’m not sure why this slipped past us – we’re going to look into that – but right now you should be able to restore connectivity by recreating the machine, which will land on a different physical host.

Sorry about that!

[szindel]

Thanks Peter, this indeed solved the issue! Thanks a lot!