UDP/QUIC server stopped receiving requests

Questions / Help
1

Hi, I have deployed a WebTransport server running on Fly that suddenly stopped working around the end of last week.

The QUIC UDP endpoint is listening on fly-global-services:443 on a dedicated IPv4 and it was able to receive and send traffic previously.

Now my client is getting a network timeout and I cannot see any connection logs on my application. It seems like the UDP traffic is not arriving at my app anymore.

I already tried the following:

  • Redeploy an older version that I know was working before.
  • Recreate the Machine in a different Region.
  • Delete and allocate a new dedicated IPv4 address.
  • Delete and recreate the whole app.

It looks similar to the issue described in Fly's sample echo app not working with UDP.

2

Hi,

just to link the issues, Iā€™m experiencing the same problem - https://community.fly.io/t/udp-connections-not-working/23453/2

3

We are working on this, will ship a fix in a moment :hourglass_flowing_sand:

4

The fix was deployed, please redeploy the app or update the machines to see the effect. ty!

5

Seems to work again now. Thanks!

1 Like
6

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