nats-io/nats-server v2.12.2-RC.1 on GitHub

Changelog

Refer to the 2.12 Upgrade Guide for backwards compatibility notes with 2.11.x.

JetStream

Added meta_compact, an advanced JetStream config option to control how many log entries must be present in the metalayer log before snapshotting and compaction takes place (#7484)

Monitoring

General

Binary stream snapshots are now preferred by default for nodes on new route connections (#7479)

JetStream

Improved the logging for observer mode (#7433)
Improve interest detection when consumers are created or deleted across different servers (#7440)
Improved the performance of enforcing max_bytes and max_msgs limits (#7455)
Streams and consumers will no longer unnecessarily snapshot when being removed or scaling down (#7495)
Streams are now loaded in parallel when enabling JetStream, often reducing the time it takes to start up the server (#7482)

General

When using message tracing, header corruption when setting the hop header has been fixed (#7443)
Fixed a bug when validating leafnode proxies (#7444)
Fixed a regression where token authentication would not be parsed correctly in leafnode URLs (#7452)
Gateway subscribe/unsubscribe will no longer block on account fetches (#7449)

JetStream

Caches will now no longer expire unnecessarily when re-reading the same sequences multiple times in first-matching code paths (#7435)
Fixed a bug in atomic batching where the incorrect field would be checked when looking for unsupported headers (#7436)
Fixed a deadlock that could happen when interleaving a direct get request with a batch write (#7458)
A couple of issues related to header handling have been fixed (#7465)
No-wait requests now return a 400 No Messages response correctly if the stream is empty (#7466)
Raft groups will now only report leadership status after a no-op entry on recovery (#7460)
Fixed a race condition in the filestore that could happen between storing messages and shutting down (#7496)