Element floods the server with registration requests if a registration fails

[babolivier]

Steps to reproduce

1. Configure Element to try to register against a server that returns an error on registration requests
2. Try to register
3. The server sends an error (I've observed this behaviour with both 400 (Unknown session ID) and 500 (Internal server error))

Outcome

What did you expect?

Element does not retry registering.

What happened instead?

Element floods the homeserver with an endless loop of registration requests. On my local homeserver I've seen it send 1 request each ~5ms.

Operating system

Arch Linux

Browser information

Firefox 103.0.2

URL for webapp

develop.element.io

Application version

Element version: 39eee10-react-9bf77963ee5e-js-3f6f5b69c7a1, olm version: 3.2.12

Homeserver

Local development version of Synapse (based on 1.65.0rc2)

Will you send logs?

Yes

[babolivier]

Hmm, I'm trying to send logs but it doesn't look like it's working - possibly because Element is flooding the logs with this:

Edit: actually it looks like sending logs is failing:

I can easily reproduce the issue though so happy to work with the team to provide more details.