NATS - v2.9.15

Changelog

Go Version

• 1.19.6: Both the release executables and Docker images are built with this Go release

Added

• Monitoring
• Add raft query parameter to /jsz to include group info (#3915)
• Update /leafz to include leaf node remove server name and “spoke” flag (#3923, #3925)

Changed

• Lower default value of jetstream.max_outstanding_catchup to prevent slow consumers between routes (#3922)
• Note: The new value is now 64MB from 128MB. This is better optimized for 1 Gbit links, however if your links are 10 Gbit or higher, this value can be set back to 128MB if slow consumers were not previously observed.

Improved

• Refactor intra-process queue to reduce allocations (#3894)
• JetStream
• Better system stability and recovery from corrupt metadata due to hard forced restarts (#3934)
• Optimize on-disk, per-subject info update (#3867)
• Limit concurrent blocking IO to improve stability under heavy IO loads (#3867)
• Improve message expiry calculation for large numbers of messages (#3867)
• Optimize when and how consumer num pending is calculated, significantly speeding up consumer info requests (#3877)
• Improve parallel consumer creation to prevent dropped messages (#3880)
• Properly warn on consumer state update state failures (#3892)
• Performance of consumer creation for certain configurations (#3901)
• Send current snapshot to followers when becoming meta-leader (#3904)
• Ensure preferred peer during stepdown is healthy (#3905)
• Optimized various store calls on stream state (#3910)
• Various performance and stability under heavy IO loads (#3922) (Thank you @matkam and @davidzhao for the report and the test harness!)

Fixed

• Fix stack overflow panic in reverse entry check when inbox ends with wildcard (#3862)
• Check if client connection name was already set when storing, preventing recursive memory growth (#3886)
• Fix check for count of wildcard tokens in “partition” subject transform (#3887) (Thank you @MauriceVanVeen for the contribution!)
• Fix panic if service export is nil (#3917) (Thank you @MauriceVanVeen for the report!)
• JetStream
• Ensure per-subject info is updated when doing stream compact (#3860)
• Ensure account usage is updated in the filestore when extended version purge occurs (#3876)
• Prevent consumer deletes on restart, with non-fatal errors (#3881)
• Do not warn if consumer replicas is zero since it will be inherited from the stream (#3882)
• Named push consumers with inactive thresholds deleted when still active (#3884)
• Prevent spurious “Error storing entry to WAL” log messages (#3893, #3891)
• Clean up consumer redelivery state on stream purge (#3892)
• Clean up consumer ack pending if below stream ack floor (#3892)
• Update ack floors on messages being expired (#3892)
• Fix lost ack pending consumer state on partial stream purge (#3892)
• Snapshot and compact the consumer RAFT WAL, even when state changes do not occur, to prevent excessive disk usage (#3898)
• Fix KV accounting errors under heavy concurrent usage (#3900)
• Ensure new replicas respect MaxAge when a stream is scaled up (#3861)
• Snapshots would not compact after being applied (#3907)
• Fix filtered pending state calculation (#3910)
• Recover from a failed truncate on raft WAL (#3911)
• Fix JWT claims update if headers are passed (#3918)
• MQTT
• Prevent use of wildcard characters with topics beginning with $, per the MQTT spec violation 4.7.2-1 (#3926) (Thank you @dominikh for the report!)

Dependency Updates

• klauspost/compress - v1.16.0
• nats-io/nats.go - v1.24.0
• golang.org/x/crypto - v0.6.0
• golang.org/x/sys - v0.5.0

Complete Changes

https://github.com/nats-io/nats-server/compare/v2.9.14...v2.9.15