RabbitMQ 3.7.8-rc.3

RabbitMQ 3.7.8 RC3

RabbitMQ 3.7.8-rc.3 a maintenance release. It focuses on bug fixes and
further improves Erlang/OTP 21 compatibility.

Upgrades and Compatibility

This release has no known incompatibilities with earlier 3.7.x releases.

Upgrading to Erlang 21.0

When upgrading to this release and upgrading Erlang to 21.0 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, RabbitMQ must be upgraded before Erlang.

Documentation Guides and Change Log

See 3.7.0 release notes upgrade and
compatibility notes 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.

Changes

Core Server

Bug Fixes

• Virtual host (specifically binding) recovery has been optimized.

  GitHub issue: rabbitmq/rabbitmq-server#1650

• A queue sync operation now can be cancelled when a resource alarm is in effect on the receiving node.

  GitHub issue: rabbitmq/rabbitmq-server#1636

• Inter-node communication port (a.k.a. distribution port) unintentionally used an excessively large
  buffer size (1.2 GB instead of 128 MB). Kudos to Chris Friesen for noticing and reporting this.

  GitHub issue: rabbitmq/rabbitmq-server#1659

• A resource alarm triggered during boot could prevent node from starting.

  GitHub issue: rabbitmq/rabbitmq-server#1644

• Syslog configuration parameters could be rejected by config validator.

  GitHub issue: rabbitmq/rabbitmq-server#1639

• rabbitmq-echopid.bat now loads rabbitmq-env.bat correctly.

  GitHub issue: rabbitmq/rabbitmq-server#1642

Enhancements

• On Erlang/OTP 21 Syslog server now can be configured using a hostname (not just an IP address).

  GitHub issue: rabbitmq/rabbitmq-server#1658

• rabbitmqctl rename_cluster_node documentation improvements.

  GitHub issue: rabbitmq/rabbitmq-server#1641

CLI Tools

Bug Fixes

• Policies were unintentionally excluded from rabbitmqctl report output.

  Contributed by Ayanda Dube.

  GitHub issue: rabbitmq/rabbitmq-cli#256

Management Plugin

Bug Fixes

• Virtual host imported from definitions or created via HTTP API will explicitly await for the vhost to initialise
  on all cluster nodes. This change was previously scheduled for 3.7.6 but was only partially applied (didn't have
  any effect on HTTP API clients).

  GitHub issues: rabbitmq/rabbitmq-management#575,
  rabbitmq/rabbitmq-management#591

• HTTP API connection endpoints returned a duplicate key, node.

  GitHub issue:

Enhancements

• Cowboy timeouts now can be configured.

  GitHub issues: rabbitmq/rabbitmq-management#594, rabbitmq/rabbitmq-management#596

• rabbitmqadmin now supports a new argument, --request-timeout.

  GitHub issue: rabbitmq/rabbitmq-management#593

• Switching sections will now scroll to the top of the newly rendered page.

  GitHub issue: rabbitmq/rabbitmq-management#590

STOMP Plugin

Bug Fixes

• Nodes experiencing very high connection churn could run out of Erlang processes.

  GitHub issues: rabbitmq/rabbitmq-stomp#125, rabbitmq/rabbitmq-server#1640

Federation Plugin

Bug Fixes

• Improved OTP release handling compatibility.

  Contributed by Ayanda Dube.

  GitHub issue: rabbitmq/rabbitmq-federation#78

Enhancements

• Link initialization optimizations.

  Contributed by Ayanda Dube.

  GitHub issues: rabbitmq/rabbitmq-federation#79, rabbitmq/rabbitmq-federation#80

Tracing Plugin

Enhancements

• It is now possible to set up a tracer on any cluster node via management UI and HTTP API.

  GitHub issue: rabbitmq/rabbitmq-tracing#24

• Tracer connection credentials now can be specified via the management UI and HTTP API.

  GitHub issue: rabbitmq/rabbitmq-tracing#25

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-3.7.8.tar.gz.