EMQ X 4.0.0 is now released, including following changes:

General

Made the following changes:

• Optimize internal code, reduce CPU and memory usage, and greatly improve performance

• Optimize handling of MQTT packets

• Rule engine supports new SQL

• Modify metrics naming and add more metrics

• Modify parameters of hooks and add more hooks

• emqtt provides command line interfaces to publish and subscribe

Fixed the following issues:

• Fix the issue that failure of SSL handshake could cause crash

• Fix the issue that max_subscriptions don't working

• Fix message out-of-order issues when forwarding across clusters

• Fix the issue that REST API and CLI cannot get multiple routes for a topic

REST API

Made the following changes:

• Support IPv6

• The default listening port for the HTTP API server is changed from 8080 to 8081

• Remove all REST API related with sessions

• connections APIs change to clients APIs，the new APIs support features in sessions

• Support return the real topic of shared subscription in querying subscriptions API

• Support to configure the default AppID and AppSecret

• The HTTP API for publishing message now supports base64 encoded payload

Fixed the following issues:

• Fix the issue that encoded URI isn't handled correctly

Authentication

Made the following changes:

• HTTP authentication plugin supports users to defining HTTP request headers in profile

• Clientid and username authentication plugin Resupport to configure the default clientid and username in profile