this PR is expected to remove messages about dropping connections to the v1 http buildcache, as well as add retries and backoff to avoid having pants users on slow internet wait 30 minutes for cache read errors: https://github.com/pantsbuild/pants/pull/8568. i've asked several times for re-review on this PR, but it's my impression that the http v1 buildcache is a bit of a dark corner, and this addresses a need that is relatively important within twitter due to our heavy dependence on the v1 buildcache (for now). i would love users who have experienced spotty connections to the pants buildcache to weigh in or sign off on this PR, and i would love if any contributor could give it a cursory review on the new

pants.cache

v1 backend introduced, for example. i'd love to get this in by EOW.