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EMQX v4.2.0
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@Rory-Z Rory-Z released this 11 Sep 10:25
· 17356 commits to master since this release
v4.2.0
fa31062

EMQX v4.2.0 is released now, it mainly includes the following changes:

Feature:

  • Support the use of third-party languages to write extension plugins to access other non-MQTT protocols, and currently supports Java and Python two programming languages. Visit Read Me for more information
  • Support hot upgrade between revisions
  • A new telemetry function is added to collect information about the usage of EMQX to help us improve the product. This function is enabled by default and supports manual disabled. Visit EMQX Telemetry for more telemetry related information.
  • Support message flow control in the form of quotas

Enhancement:

  • The rule engine supports the creation of subscriptions for MQTT bridges
  • The rule engine supports a more powerful SQL syntax
  • Plugins such as MySQL and PostgreSQL fully support IPv6, SSL/TLS
  • Support CentOS 8, Ubuntu 20.04 operating system and ARM64 system architecture
  • Webhook supports configuring custom HTTP headers
  • A more friendly alarm mechanism, providing developers with HTTP API
  • Optimize retained message performance

Change:

  • Subsequent versions will no longer support Debian 8, Ubuntu 14.04 and Raspbian 8 operating systems
  • The emqx-statsd plugin is officially renamed to emqx-prometheus
  • Publish and subscribe support independent configuration of topic rewrite rules
  • Allow users to configure whether to allow WebSocket messages to contain multiple MQTT messages to be compatible with some clients
  • Adjust RPC port discovery strategy
  • Incompatible changes: The API path provided by the emqx-auth-mnesia plugin has been adjusted to api/v4/mqtt_user and api/v4/mqtt_acl
  • The emqx-auth-http plugin disables super user authentication requests by default
  • emqx-bridge-mqtt disables bridge mode by default

Bug fixes:

  • Fix the issue of abnormal memory growth caused by the topic metrics feature
  • Fix the issue that the LwM2M plugin did not correctly obtain the protocol version
  • Fix the issue that the command line interface cannot be used when running multiple emqx instances on one machine
  • Fix the issue that Websocket connection does not support IPv6
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