RabbitMQ 3.7.16-rc.3

RabbitMQ 3.7.16

RabbitMQ 3.7.16-rc.3 is a candidate of a maintenance release. It focuses on bug fixes and minor usability improvements.

Erlang/OTP Compatibility Notes

Per the new Erlang version support policy in effect starting with January 2019,
this release no longer supports Erlang/OTP 19.3.
Make sure a supported Erlang version is used before upgrading.

Provisioning Latest Erlang Releases explains
what package repositories and tools can be used to provision latest patch versions of Erlang 21.3.x and 22.x.

Compatibility Notes

Upgrading to Erlang 21.x or Later Versions

When upgrading to this release and upgrading Erlang to 21.x or later at the same time, extra care has to be taken.
Since CLI tools from RabbitMQ releases older than 3.7.7 will fail on Erlang 21 or later,
RabbitMQ must be upgraded before Erlang.

Upgrade Doc Guides and Change Log

See 3.7.0 release notes upgrade
and compatibility notes first if upgrading from an earlier release.

See the Upgrading guide for general documentation on upgrades
and RabbitMQ change log for release notes of other releases.

Getting Help

Any questions about this release, upgrades or RabbitMQ in general are welcome on the
RabbitMQ mailing list.

Changes

Core Server

Enhancements

• It is now possible to configure default worker pool size:

  default_worker_pool_size = 1024

  This may be necessary in environments with a large number of queues (say, hundreds of thousands)
  to speed up queue and binding recovery on node boot. By default the size of the pool is
  computed as the number of available runtime schedulers.

  GitHub issue: rabbitmq/rabbitmq-server#2030

CLI Tools

Enhancements

• New health check: rabbitmq-diagnostics check_virtual_hosts.

  rabbitmq/rabbitmq-cli#302

• rabbitmq-diagnostics schema_info displays information about internal database schema
  (tables, their properties and metadata).

  rabbitmq/rabbitmq-cli#330

Management Plugin

Bug Fixes

• When multiple definition files were imported on node boot, errors were not reported
  the same way they would be with a single file.

  GitHub issue: rabbitmq/rabbitmq-management#710

Enhancements

• The plugin now disables client inactivity timeout for the definition import endpoints and reports
  progress using periodic 102 Processing responses so that the connection is kept alive even if importing
  definition takes a long time.

  GitHub issue: rabbitmq/rabbitmq-management#711

Shovel Plugin

Bug Fixes

• 3.7.15 introduced a regression where Shovels would not try to reconnect after a network
  failure.

  GitHub issue: rabbitmq/rabbitmq-shovel#60

Web MQTT Plugin

Bug Fixes

• Default maximum connection limit set by a dependency (1024) has been lifted.

  GitHub issue: rabbitmq/rabbitmq-web-mqtt#55

• Client ID wasn't propagated to connection metadata for MQTT connections over WebSockets.

  GitHub issue: rabbitmq/rabbitmq-web-mqtt#57

Web STOMP Plugin

Bug Fixes

• Default maximum connection limit set by a dependency (1024) has been lifted.

  GitHub issue: rabbitmq/rabbitmq-web-stomp#113

Trust Store Plugin

Enhancements

• It is now possiible to configure HTTPS proxy settings for the HTTPS backend.

  GitHub issue: rabbitmq/rabbitmq-trust-store#69

Debian Package

Bug Fixes

• Exit code 69 is now considered a success again in the systemd service file.

  GitHub issues: rabbitmq/rabbitmq-server-release#104, rabbitmq/rabbitmq-server-release#51

Source code archives

Warning: The source code archive provided by GitHub only contains the source of the broker,
not the plugins or the client libraries. Please download the archive named rabbitmq-server-3.7.16.tar.xz.