HTTP 429 too many requests for Pex PEX

[jsirois]

Seen in TravisCI "Build OSX wheels (Python 3.6)" shard.

Looks like:

curl: (22) The requested URL returned error: 429 too many requests
Curl failed with args: -s https://github.com/pantsbuild/pex/releases/download/v2.1.6/pex

We may need to investigate whether we can bump rate limits with GitHub, host in some other manner or correct some endemic problem if we have one with asking for the binary too often.

[jsirois]

According to https://help.github.com/en/github/administering-a-repository/about-releases there is no bandwidth limit. Just a size limit of 2GB max per file.

[huonw]

I think we can close this, given:

• it's intimately tied to a moving target (GitHub itself)
• CI seems to have switched from Travis to GitHub, and maybe GHA gets special treatment for downloading GH releases
• I don't think I've seen this as the cause of any of the flakes I've been affected by recently (it'd be good to have cross-build aggregation of failures to confirm this for sure, though: CI: collect/aggregate results to highlight flakiest tests #19182)
• it's been three years without movement

Feel free to reopen if you disagree.