Rollback tokio to LTS release v1.14 #25028
Merged
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Problem
The RPC stall problem we are debugging appears when upgrading tokio from v1.15 to v1.16. Our master branch is already on tokio v1.17, which means it will suffer the stalls.
Summary of Changes
Rollback tokio, and pin to the long-term support release v1.14, until we can figure out why newer tokio breaks things.
Inspired by #24644
(Last one. Sorry for doing this in the exactly wrong order, but each of these needed a little hand-holding)