Salsa HTTP requests randomly get terminated on HTTP/2 protocol errors or HTTPS issues without returning any responses

This is visible to users with UI notifications such as:

We are currently unable to fetch data for the pipeline header.

Looking at the browser console, this was a HTTP request to https://salsa.debian.org/api/graphql?query=query%20getPipelineHeaderData(.. which failed on net::ERR_HTTP2_PROTOCOL_ERROR:

Occasionally in CI jobs I also see this error:

When it happens the dev console shows the same HTTP/2 issue:

Any idea where these might stem from? Does salsa.debian.org (godard.debian.org) have some reverse proxies or HTTP/2 or HTTPS termination hosts in front of GitLab?

Edited Aug 07, 2024 by Otto Kekäläinen

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information