nats-io/nats-server v2.12.1-RC.1 on GitHub

Changelog

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

JetStream

The store lock is no longer held while searching for TTL expiry tasks, improving performance (#7344)
Removing a message from the TTL state is now faster (#7344)
The filestore no longer performs heap allocations for hash checks (#7345)
The filestore now reuses pooled write cache allocations more efficiently (#7346)
Meta snapshot performance for a very large number of assets has been improved after a regression in v2.11.9 (#7350)
Sequence-from-timestamp lookups, such as those using opt_start_time on consumers or start_time on message get requests, now use a binary search for improved lookup performance (#7357)
Scheduled messages are now deactivated properly when followed up with another message on the same subject without a schedule (#7366)

General

Fixed the exit code when receiving a SIGTERM signal immediately after startup (#7367)

JetStream

Batch check now uses the correct subject instead of the last subject that does the commit (#7342)
Removed messages with a per-message TTL are now removed from the TTL state immediately (#7344)
Fixed a bug where TTL state was recovered on startup with subject delete markers enabled, that message expiry would not start as expected (#7344)
Expiring messages from the filestore no longer leaks timers and expires at the correct time (#7344)
Fixed a bug where scheduled messages would not trigger correctly after recovery (#7347)
Deleting a non-existent sequence on a stream no longer results in a cluster reset and leadership election (#7348)
Subject tree intersection now correctly handles overlapping literals and partial wildcards, i.e. stream.A and stream.*.A, fixing some consumer or message get filters (#7349)
A data race when checking all JetStream limits has been fixed (#7356)
Raft will no longer trigger a reset of the clustered state due to a stream snapshot timeout (#7293)
Atomic batches now reject unsupported commits (#7368)