Problem
GetStatsResult encodes per_key_stats and per_throttle_stats counts as u16, capping at 65,535 entries per list. If a queue has more fairness keys or throttle keys than that, the response is silently truncated (with a warn log added in Epic 20).
65k distinct fairness keys on a single queue is reachable for high-cardinality workloads (e.g., per-customer fairness on a shared queue at scale).
Proposed fix
Change per_key_stats and per_throttle_stats counts from u16 to u32 in docs/protocol.md and crates/fila-fibp/src/types.rs. This is a wire format change that needs coordinated updates across server + all SDKs.
Files affected
docs/protocol.md — GetStatsResult frame formatcrates/fila-fibp/src/types.rs — encode/decode for FibpGetStatsResponse- All external SDKs (Go, Python, JS, Ruby, Java) — stats response parsing
Problem
GetStatsResultencodesper_key_statsandper_throttle_statscounts asu16, capping at 65,535 entries per list. If a queue has more fairness keys or throttle keys than that, the response is silently truncated (with a warn log added in Epic 20).65k distinct fairness keys on a single queue is reachable for high-cardinality workloads (e.g., per-customer fairness on a shared queue at scale).
Proposed fix
Change
per_key_statsandper_throttle_statscounts fromu16tou32indocs/protocol.mdandcrates/fila-fibp/src/types.rs. This is a wire format change that needs coordinated updates across server + all SDKs.Files affected
docs/protocol.md— GetStatsResult frame formatcrates/fila-fibp/src/types.rs— encode/decode forFibpGetStatsResponse