- Fixed multiple JetStream and cluster bugs including purge count, panic on unlocked RWMutex, stream sealing flags, and consumer redelivery decoding
- Resolved gateway and leafnode issues such as lost gossip URLs, inaccurate /varz reporting, memory leak on authorization violations, and OCSP update handling
- Patched TLS timer leak and added URL redaction before logging
Release v2.6.3
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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;