EMQ X 4.2-beta.1 is released now, it mainly includes the following changes:

emqx

Enhancements:

• Support quotas to limit the number of messages forwardeds

  Github PR: emqx#3656

• Support for collecting telemetry data and disable it by default

  Github PR: emqx#3653

Bug fixes:

• Fix the issue that WebSocket doesn't support IPv6

  Github PR: emqx#3654

emqx-rel

Enhancements:

• Support hot upgrade between revisions

  Github PR: emqx-rel#571

emqx-rule-engine

Enhancements:

• Support new SQL syntax

  Github PR: emqx-rule-engine#168

• Support users to set rule ID and resource ID

  Github PR: emqx-rule-engine#169

emqx-exproto

Bug fixes:

• Fix some issues

  Github PR: emqx-exproto#9

emqx-web-hook

Enhancements:

• Support HTTPS

  Github PR: emqx-web-hook#209

emqx-auth-clientid

Bug fixes:

• Fix the error caused by the searched authentication information does not exist

  Github PR: emqx-auth-clientid#145

emqx-auth-http

Bug fixes:

• Disable super user authentication request by default

  Github PR: emqx-auth-http#195

emqx-bridge-mqtt

Enhancements:

• Bridge mode is disabled by default

  Github PR: emqx-bridge-mqtt#95

emqx-management

Enhancements:

• Support HTTP API and CLI for telemetry, and provide the telemetry data query api

  Github PR: emqx-management#253