mirror of
https://github.com/vitorpamplona/amethyst.git
synced 2026-10-05 19:28:25 +00:00
davotoula
ae2e971dd9
The pre-insert cache look added in 6dc631e85d narrowed the single-flight
gap but didn't close it: a fast leader can insert, sign, cache and retire
its entry entirely between a straggler's cache read and its putIfAbsent,
so the straggler wins an empty map and signs a second time. That is the
intermittent `expected:<1> but was:<2>` in aFastSignerStillSharesOneSignature
failing main CI.
Check the cache again once this caller owns the slot. A leader always caches
before retiring its entry, so any token minted before the insert is visible
there; take it and give the slot back instead of re-signing.
Reproduced locally at round 2431 of 5000; two 5000-round runs pass with the fix.