rabbitmq/rabbitmq-server v4.1.5 on GitHub

RabbitMQ 4.1.5 is a maintenance release in the 4.1.x release series.

It is strongly recommended that you read 4.1.0 release notes
in detail if upgrading from a version prior to 4.1.0.

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.

Classic queues could run into a rare message store exception that resuulted in
a loss of a few messages.
Special kudos to the contributors who have spent a very significant amount of time
reproducing and debugging the issue: @lhoguin @lukebakken @trvrnrth @gomoripeti
GitHub issues: #14181, #14576
Messages routed to quorum queues during or immediately before a network partition,
in some cases were not re-republished internally in certain cases.
GitHub issue: #14589
Quorum queues with disabled poison message handling
(an unlimited number of redeliveries, which is not a recommended practice) could accumulate
a significant number of Raft log segment files.
GitHub issues: #14202, #14458

Streams declaration response was missing a leader field when the stream was declared via AMQP 1.0 or 0.9.1
(that is, not the RabbitMQ Stream Protocol).
GitHub issue: #14476

Fixes JSON formatting of cluster nodes produced by rabbitmq-diagnostics status --formatter json
GitHub issue: #14509

Requesting shovel status via Prometheus at a specific moment resulted in an exception
because the plugin did not consider a highly transient starting state.
GitHub issue: #14481