NATS v2.14.1

Changelog

Refer to the 2.14 Upgrade Guide for backwards compatibility notes with 2.12.x. Please note that the 2.13.x version was skipped.

Go Version

• 1.26.3 (#8107)

Dependencies

• github.com/klauspost/compress v1.18.6 (#8124)
• golang.org/x/crypto v0.51.0 (#8124)
• golang.org/x/sys v0.44.0 (#8124)

Added

General

• New metrics in_client_msgs, in_client_bytes, out_client_msgs and out_client_bytes are now available via the /varz monitoring endpoint for tracking data to/from normal clients only (#7851)

Improved

General

• Client TLS certificates without subject DNs but with DNS subject alternate names are now permitted (#8100)
• The log level of TLS handshake timeout or non-TLS record errors have been demoted to debug level to reduce noise (#8096)

JetStream

• Num pending is now only calculated on consumer leaders, avoiding unnecessary CPU usage on followers (#8172)
• Snapshot and catchup loops no longer leak timers (#8186, thanks to @SebTardif)
• Stream and consumer assignment errors are now surfaced (#8208)
• Intersection of sublists and subject trees can now be cancelled early, avoiding high CPU usage in some pathological cases (#8209)

Fixed

General

• Cluster route compression now obeys the cluster max_pings_out option if configured (#8093)
• The internal send loop no longer mutates caller headers, which could corrupt buffers (#8097)
• Removing headers no longer fails to remove later headers if the matching prefix also appeared in an earlier header value (#8103)
• The sublist now correctly maintains negative results in the cache when calculating number of interested subjects (#8119)
• Server shutdown requests are now idempotent, preventing concurrency issues when shutting down in embedded contexts (#8163)
• TLS listeners now work correctly with the PROXY protocol where enabled (#8130)
• Reduced lock contention that could be created between leafnodes and clients (#8139, #8159)
• Fixed a panic that could happen when an error occurs when walking JWT directory resolver folders (#8173, thanks to @SebTardif)
• In-process connections will no longer unexpectedly revert to TLS required with async INFO (#8205)

Leafnodes

• Leafnode connections will no longer negotiate compression if they are configured over already-compressed WebSockets (#7969)

JetStream

• Fast batch now correctly parses the batch sequence as a uint64 (#8094)
• Atomic batch no longer double-pools committed entries on cleanup (#8098)
• Raft nodes will now ignore temporary snapshots on recovery after a crash (#8101)
• A number of paths that could leave consumer redelivered in a drifted state have been fixed, e.g. with workqueue or interest-based streams with max_deliver, on single message removal or after purges/compactions (#8102)
• Caches are now cleared correctly when converting filestore encryption mode, avoiding block-level corruption (#8105, #8166)
• Fixed a race condition when updating the deduplication map on leader change (#8106)
• Source consumer creation will no longer schedule a recreation if a setup is already in progress, avoiding potential setup storms (#8111)
• Fixed data races when reading from the stream configuration when checking reservations, answering some API requests amongst others (#8115)
• Stream republish subjects are now validated correctly (#8127)
• The delivery policy for consumers on clustered workqueue streams is now enforced correctly (#8126)
• The Nats-Schedule-Next: purge action now correctly checks if the target is a schedule (#8135)
• Raft node append entry caches are now invalidated correctly on WAL truncation and snapshot installs (#8149)
• Skip message errors are now surfaced correctly, propagating failures (#8152)
• Mirror consumers are now retried immediately on a last sequence mismatch, avoiding stalling for longer than necessary (#8152)
• Raft nodes will no longer allow proposals to remove unknown peers (#8154)
• Pending state no longer leaks when reaching max deliveries (#8156)
• A panic when reusing a wait group when resetting a stream's clustered state has been fixed (#8158)
• Correctly reset local meta log when extending the meta group to a parent domain (#8142)
• Consumer file stores will now correctly flush when deleting a single redelivery, avoiding unexpected further redeliveries (#8168)
• Storage reservations for un-tiered streams have been made consistent between creates/updates and clustered/non-clustered modes (#8170)
• Raft will now correctly cancel an in-flight checkpoint operation when resetting (#8180, #8202)
• The JetStreamMaxMemory and JetStreamMaxStore options are now handled correctly in embedded mode (#8184)
• A number of fields that were aliasing underlying filestore block caches have been fixed (#8187)
• Consumers with inactive_threshold should no longer have their local state deleted unexpectedly when the proposal to the metalayer to clean up the consumer fails (#8198)
• Metalayer state is now preserved in a number of cases where it was incorrectly being removed on shutdown (#8199)

MQTT

• Invalid characters in subjects are now rejected correctly, avoiding protocol issues when forwarded to other connection types (#8104, #8112)

Complete Changes

https://github.com/nats-io/nats-server/compare/v2.14.0...v2.14.1