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3.7.16

release-notes/3.7.16.md

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RabbitMQ 3.7.16

RabbitMQ 3.7.16 is 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

OpenSUSE Leap 42.3 Support Dropped

OpenSUSE Leap 42.3 has gone out of support on July 1st, 2019. Packages for that distribution are therefore no longer produced because upstream OpenSUSE repositories are no longer available.

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

Bug Fixes

  • When a node hosting an exclusive queue was restarted with queue leader locator being something other than "node local", redeclaration of the queue failed.

    Contributed by Lajos Gerecs.

    GitHub issue: rabbitmq/rabbitmq-server#2039

Enhancements

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

    ini
    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

Bug Fixes

  • rabbitmqctl report and rabbitmqctl list_queues could fail with a {bad_argument,type} because of a 3.8-specific column was erroneously listed as supported.

    Contributed by Lajos Gerecs.

    GitHub issue: rabbitmq/rabbitmq-cli#354

Enhancements

  • New health check: rabbitmq-diagnostics check_virtual_hosts.

    rabbitmq/rabbitmq-cli#302

  • New observability command, rabbitmq-diagnostics log_location [--all], displays log file location(s) on target node. The node is assumed to be running.

    GitHub issue: rabbitmq/rabbitmq-cli#325

  • New observability commands, rabbitmq-diagnostics log_tail and rabbitmq-diagnostics log_tail_stream, provide a way to remotely inspect recent log file entries on a running node. The commands are meant to be used for troubleshooting and not to automate log aggregation.

    GitHub issue: rabbitmq/rabbitmq-cli#326

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

    rabbitmq/rabbitmq-cli#330

Management Plugin

Bug Fixes

Enhancements

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

Web STOMP Plugin

Bug Fixes

Trust Store Plugin

Enhancements

Debian Package

Bug Fixes

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.