release-notes/3.8.6.md
RabbitMQ 3.8.6 is a maintenance release.
It focuses on bug fixes and usability improvements.
Starting with this release, core RabbitMQ server and all tier 1 plugins are relicensed under the Mozilla Public License 2.0 (previously used license: the Mozilla Public License 1.1).
The permissiveness of the MPL 2.0 is largely the same as of the MPL 1.1. See the MPL 2.0 FAQ and MPL 2.0 Revision and Changes FAQ to learn more.
This release is compatible with Erlang 23.
This release requires Erlang/OTP 21.3 or later.
22.3 or 23.0 releases are recommended.
Provisioning Latest Erlang Releases explains
what package repositories and tools can be used to provision latest patch versions of Erlang 22.3.x.
This release removed HiPE precompilation support. HiPE has been deprecated and mostly unmaintained since Erlang 22, and will be replaced with a JIT in Erlang 24 in 2021.
rabbitmqctl hipe_compile
and
hipe_compile = true
are both retained for backwards compatibility but they won't have any effect.
See 3.8.0 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.
When upgrading to this release from 3.7.6 or an older version, 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 at the same time as Erlang.
Alternatively the node can be upgraded to 3.7.18 first, then Erlang 22.x or 23.x, then RabbitMQ to most recent
3.8.x release.
Any questions about this release, upgrades or RabbitMQ in general are welcome on the RabbitMQ mailing list.
RabbitMQ has been relicensed under the Mozilla Public License 2.0 (previously used license: the Mozilla Public License 1.1).
The permissiveness of the MPL 2.0 is largely the same as of the MPL 1.1. See the MPL 2.0 FAQ and MPL 2.0 Revision and Changes FAQ to learn more.
Removed HiPE pre-compilation support.
GitHub issue: rabbitmq/rabbitmq-server#2392
Definition import on node boot (via the built-in load_definitions configuration setting) is now performed
after plugins are enabled.
This resolves a long-standing chicken-and-egg dependency problem that prevented definitions that depend on plugins being functional from being successfully imported during node boot.
Note that definition import via the management plugin (management.load_definitions) is still
performed during management plugin activation time and therefore can not offer any guarantees
as some plugins may be enabled after the management one.
Some affected features include
GitHub issue: rabbitmq/rabbitmq-server#2384
Similarly, client connection listeners (both TCP and TLS-enabled) are now started after plugin activation. This makes certain configurations that use the trust store plugin behave as expected.
GitHub issue: rabbitmq/rabbitmq-server#2405
Environment variables prefixed with RABBITMQ_ were ignored when used in the rabbitmq-env.conf file,
while their prefixless counterparts worked as expected.
GitHub issue: rabbitmq/rabbitmq-common#401
rabbitmq.conf config parser now accepts lines that only consist of whitespace.
GitHub issue: rabbitmq/rabbitmq-server#2393
rabbitmqctl hipe_compile is now a no-op. HiPE support has been deprecated in Erlang 22
will be removed in Erlang 24.
GitHub issue: rabbitmq/rabbitmq-cli#433
The use of the `` environment variable to configure the shared secret is now deprecated.
Use the local file option instead or, if the value absolutely must be provided on the command line,
the --erlang-cookie [value] switch.
GitHub issue: rabbitmq/rabbitmq-cli#443
rabbitmqctl export_definitions incorrectly serialised runtime parameter values.
GitHub issue: rabbitmq/rabbitmq-cli#435
CTL_ERL_ARGS environment variable was unintentionally ignored starting with version 3.8.4.
GitHub issue: rabbitmq/rabbitmq-server#2394
[command] --help and help [command] output had minor unintentional inconsistencies.
GitHub issue: rabbitmq/rabbitmq-cli#437
rabbitmq-queues check_if_node_is_quorum_critical and rabbitmq-queues check_if_node_is_mirror_sync_critical checks
have been adjusted. They now special case single node clusters as the check does not make much sense
in those environments.
rabbitmq-queues check_if_node_is_mirror_sync_critical now also excludes exclusive queues from
consideration as they, even if matched by a policy that enables classic queue mirroring,
would not actually be mirrored.
GitHub issue: rabbitmq/rabbitmq-cli#432
rabbitmq-diagnostics status now includes the total amount of memory used by the node in its
regular output. It was previously only available when --formatter=json switch was used.
GitHub issue: rabbitmq/rabbitmq-cli#449
rabbitmq-diagnostics erlang_cookie_sources is a new command that helps with troubleshooting
CLI tool authentication to nodes by listing relevant environment information about the
shared secret. The actual secret
is not displayed for obvious security reasons.
GitHub issue: rabbitmq/rabbitmq-cli#446
rabbitmqct eval_file is a new command that evaluates Erlang code expressions from a local file
on the target node:
rabbitmqctl eval_file /path/to/code_snippet.escript
GitHub issue: rabbitmq/rabbitmq-cli#438
rabbitmqct eval now accepts code snippets from standard input:
rabbitmqctl eval <<EOF
io:format("~p~n", [
rabbit:product_info()
]).
rabbitmqctl eval < code_snippet.escript
GitHub issue: rabbitmq/rabbitmq-cli#438
rabbitmq-diagnostics resolve_hostname is a new command that resolves a hostname either locally
or on the node, and returns the resolved IPv4 or IPv6 addresses.
The command can help quickly detect hostname resolution irregularities on a node, including the effects of Erlang inetrc file settings. Hostname resolution issues can cause CLI tools, cluster formation and peer reconnection to not work as expected.
Some examples:
rabbitmq-diagnostics resolve_hostname "google.com" --address-family ipv4
rabbitmq-diagnostics resolve_hostname "google.com" --address-family ipv6 --offline
GitHub issue: rabbitmq/rabbitmq-cli#431
All CLI tools now provide an autocomplete [prefix] command that lists command completion
options. It is intended to be used to implement autocompletion of command names in shells.
GitHub issue: rabbitmq/rabbitmq-cli#439
The plugin could send the authorization header as null in some cases before a successful login.
Contributed by @furkhat.
GitHub issue: rabbitmq/rabbitmq-management#833
The UI now uses more human-friendly information units when displaying client network traffic rate values.
Contribute by @seadog007.
GitHub issue: rabbitmq/rabbitmq-management#827
In environments where rabbitmq_federation.pgroup_name_cluster_id is not set or set to undefined,
links will treat such values as a false (the default) instead of failing with an exception.
GitHub issue: rabbitmq/rabbitmq-federation#109
The plugin could fail to accept new client connections with an exception in some cases.
GitHub issue: rabbitmq/rabbitmq-mqtt#235
Certain Web Socket errors are now handled more gracefully.
GitHub issue: rabbitmq/rabbitmq-web-stomp#123
Certain Web Socket errors are now handled more gracefully.
GitHub issue: rabbitmq/rabbitmq-web-mqtt#64
Virtual host access checks failed in certain complex configurations.
GitHub issue: rabbitmq/rabbitmq-auth-backend-http#100
cuttlefish was upgraded from 2.2.0 to 2.3.0credentials_obfuscation was upgraded from 2.0.0 to 2.1.1Warning: 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-3.8.6.tar.xz.