KIP-1075 — Introduce delayed remote list offsets purgatory to make LIST_OFFSETS async

Accepted Kafka 4.0 Tiered StorageBroker

KIP-1075 introduces a delayed purgatory (`DelayedRemoteListOffsets`) and a new `TimeoutMs` field in `ListOffsetsRequest` so timestamp-based offset lookups that require fetching remote indexes are handled asynchronously by dedicated remote-log-reader threads rather than blocking request-handler threads. `ListOffsets` requests against remote-storage-enabled topics require non-deterministic latency to fetch remote offset and time indexes; when many such requests arrive concurrently, request-handler thread exhaustion starves higher-priority `FETCH` and `PRODUCE` requests.

Protocol Impact

ListOffsets v10

Details