athens hanging with go mod download

[ErikEngerd]

Describe the bug

Using the go.mod provided, do go clean -modcache and then do a go mod download. The download will hang.

Error Message
If applicable add error message to help explain your problem or console output enclose in triple back-ticks eg,

```console
> go mod download
go: downloading go1.25.0 (linux/amd64)
go: download go1.25.0: golang.org/toolchain@v0.0.1-go1.25.0.linux-amd64: reading https://depot.wamblee.org/repository/wamblee-go-proxy/golang.org/toolchain/@v/v0.0.1-go1.25.0.linux-amd64.zip: 504 Gateway Timeout

```

To Reproduce
Steps to reproduce the behavior:

• go clean --modcache
• go mod download

Expected behavior
A clear and concise description of what you expected to happen.
Downloads artifacts at least at the same speed as the internet, but it also hangs when I am doing a download for a go module that I already built before through athens.

Environment (please complete the following information):

• OS: [e.g. Linux 64bit] Debian trixie amd64
• Go version : 1.26.0 (also fails with other versions)
• Proxy version : 0.18.1
• Storage (fs/mongodb/s3 etc.) :

Additional context
Add any other context about the problem here.

[ErikEngerd]

This happens with direct access to athens, no additional proxy in between.

[ErikEngerd]

This is happening with ATHENS_GOGET_WORKERS set to "3" which is relatively low. However, it appears that it gets into a permanent hang (deadlock?) and does not recover. Setting it to "10" seems more robust. The problem is that it this low value triggers a permanent hang.

,

[ErikEngerd]

It must be an issue with timeouts to the go proxy used by athens but the logs are really silent. The client gets a timeout but the server does not show anyting (I also have debug logging on ATHENS_LOG_LEVEL=debug). So perhaps to start with, logging could be improved?

[ErikEngerd]

I have now configured it to use the standard go proxy proxy.golang.org. I think github was the cause for the hangs.