RabbitMQ 4.0.5​

RabbitMQ 4.0.5 is a new patch release in the 4.0.x series.

This series is currently covered by community support.

Release Artifacts​

Release artifacts can be obtained on GitHub as well as RPM, Debian package repositories.

Upgrade Guidance​

If upgrading from a version prior to 4.0, please consult the 4.0 release notes.

RabbitMQ 4.1 introduces an exciting new feature: AMQP filter expressions for streams.

This feature enables RabbitMQ to support multiple concurrent clients, each consuming only a specific subset of messages while preserving message order. Additionally, it minimizes network traffic between RabbitMQ and its clients by dispatching only the messages that match the clients' interests.

In this blog post, we’ll explore what AMQP filter expressions are and walk through a simple Java example of how to use them.

This blog post explores use cases of the AMQP 1.0 modified outcome.

This blog post outlines ten advantages of AMQP 1.0 flow control over AMQP 0.9.1, supported by two benchmarks demonstrating significant performance gains. Additionally, we delve into the powerful AMQP 1.0 flow control primitives and how they are used in RabbitMQ.

RabbitMQ 4.0 (currently in beta) includes new quorum queue features:

• message priorities
• consumer priorities combined with Single Active Consumer
• default delivery limit is now 20 (breaking change!)
• faster recovery of long queues

This blog post demonstrates that native AMQP 1.0 in RabbitMQ 4.0 provides significant performance and scalability improvements compared to AMQP 1.0 in RabbitMQ 3.13.

Additionally, this blog post suggests that AMQP 1.0 can perform slightly better than AMQP 0.9.1 in RabbitMQ 4.0.

Team RabbitMQ has two updates related to our Debian and RPM repositories:

1. On August 18, 2024, Team RabbitMQ's PackageCloud account will be discontinued
2. Cloudsmith mirror repositories now use *.rabbitmq.com domains, please update your repository definition files

We are pleased to announce that RabbitMQ 4.0 supports AMQP 1.0 as a core protocol, providing the following benefits:

• Modernized RabbitMQ to natively support the latest AMQP standard
• Support for more AMQP 1.0 features
• Significantly better AMQP 1.0 performance and scalability compared to RabbitMQ 3.13
• Greater interoperability with other AMQP 1.0 message brokers
• AMQP 1.0 is enabled by default in RabbitMQ 4.0

Effective June 1st, the RabbitMQ community support and release policies will change for the open source distributions of RabbitMQ. The goal of these changes is to ensure that the RabbitMQ team has time to focus on developing new features for the Open Source and commercial versions of RabbitMQ.

Erlang/OTP 27.0 was released on May 20th, 2024. While it contains a lot of exciting features and improvements, unfortunately RabbitMQ currently doesn't work well with this version.