NATS - v2.9.2

Changelog

Go Version

• 1.19.1: Both release executables and Docker images are built with this Go release.

Improved:

• Fan-out performance degraded between v2.8.4 and v2.9.0. This was mainly due to addition of message count/size accounting per-account. Some code refactoring restored or even increased the performance compared to v2.8.4 (#3504)

Fixed

• JetStream:
  • Prevent panic processing a consumer assignment. This could happen in rare situations where a stream would catchup and start processing consumer assignments while the stream itself was "stopped", for instance during a cluster-reset event following a sequence mismatch detection, etc... (#3498)
  • The FileStore implementation could have held into memory of message blocks for longer (about 5 seconds) than needed. In situations where the stream was filling up quickly, the amount of blocks held in memory could grow enough that even 5 seconds expiration could cause the memory growth to be noticeable, even more so if the garbage collection has no reason to trigger if the overall memory usage is below the host's limit (#3501)
  • Scaling a consumer down to a R=1 would work but not send a response to the CLI/application requesting that change. That is, if an application would call js.UpdateConsumer() (using the Golang client library) with a replica of 1, the call would timeout but the operation would actually succeed (#3502)
  • The consumer names paging had issues and could have returned only the API limit, which for this request is 256 (#3510)
  • Some streams may fail to be recovered if a meta-layer snapshot was done but an upstream source or mirror changed it subjects (#3508)
  • Redeliveries for consumers with the "LastPerSubject" delivery policy were not honored. Thanks to @brentd for the report (#3511)
• Possible exit of NATS Server running as a Windows service without logging enabled when server would report invalid protocols. The workaround is to enable logging (specify a log file as opposed to have the logging directed to the Windows Event Logs). Thanks to @BentTranberg for the report (#3497)

Complete Changes

https://github.com/nats-io/nats-server/compare/v2.9.1...v2.9.2