- Added support for PROXY protocol (v1/v2) on client connections and introduced write timeout options for clients, routes, gateways, and leafnodes.
- Introduced new monitoring endpoints (expvar /debug/vars and enhanced /jsz) and added meta compact settings for JetStream snapshots and compaction.
- Fixed numerous issues including header corruption in message tracing, race conditions, deadlocks, and bugs in leafnode proxy validation, token authentication, and JetStream stream handling.
Release v2.12.2
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Added Leafnodes support with a configurable dial timeout option for high‑latency links
Upgrade to Go 1.25.12 and bump critical dependencies (klauspost/compress v1.19.2, golang.org/x/crypto v0.55.0).
Decoupled Raft transport and increased disk concurrency (now configurable) with several JetStream performance and memory optimizations;