rabbitmq/rabbitmq-server v4.3.4 on GitHub

RabbitMQ 4.3.4 is a maintenance release in the 4.3.x release series.

It is strongly recommended that you read 4.3.0 release notes
in detail if upgrading from a version prior to 4.3.0.

The minimum supported Erlang version for this release series is 27.0.

RabbitMQ and Erlang/OTP Compatibility Matrix has more details on Erlang version requirements for RabbitMQ.

Nodes will fail to start on older Erlang releases.

Changes Worth Mentioning

Release notes can be found on GitHub at rabbitmq-server/release-notes.

Quorum queues in clusters upgraded from 3.13.x to 4.2.x and then to 4.3.x could stop
emitting metrics and taking snapshots after a node restart.
GitHub issues: #16974, #16990
The AMQP 1.0 parser now detects standard message body sections more strictly.
GitHub issue: #17017
The AMQP 1.0 parser now decodes certain array values more efficiently.
GitHub issue: #16994

The single active consumer coordinator
did not notify a consumer that was re-selected for activation while it was still deactivating,
leaving the group without an active consumer.
Contributed by @pterygota.
GitHub issues: #16975, #16976

Very short lived exclusive queues could cause an exception during metric collection, producing
log noise.
GitHub issues: #16989, #16999, #17002
After an IdP-initiated OAuth 2 login, the management UI now returns the user
to the page that was open before the login instead of the default one.
Contributed by @thisisnsh.
GitHub issues: #16957, #16961

The management UI Content Security Policy (CSP) no longer includes the unsafe-eval and
unsafe-inline directives.
GitHub issue: #16916

In scenarios that involved a federated queue and a federated exchange with exactly the same name in the same virtual host,
deleting an upstream unintentionally corrupted the federated exchange(s) operating state, breaking federation
for the exchange in question.
GitHub issues: #16991, #16997

None in this release.