Remove the unnecessary transactions to optimize session management.

Should not exit arbitrarily when clientid conflicts in mnesia.

Change the default value of ‘mqtt.session.enable_stats’ to ‘on’.

The DUP flag should be set to 0 for all QoS0 messages. (emqttd#1319)

Fix the ‘no function clause’ exception. (emqttd#1293)

The management API should listen on 0.0.0.0:8080. (emqttd#1353)

Fast close the invalid websocket in init/1 function.

erlang:demonitor/1 the reference when erasing a monitor. (emqttd#1340)

emq-retainer

Don’t clean the retain flag after the retained message is stored.

Add three CLIs for the retainer plugin. (emq-retainer#38)

emq-modules

Turn off the subscription module by default. (emq-modules#26)

Add an integration test case for sleeping device.

Do not send will topic if client is kicked out.

Prevent crash information in log when emq_sn_gateway getting timeout, since it is a possible procedure.

emq-relx

Support node cookie value with = characters. (emq-relx#146)