emqx/changes/ce/feat-12201.en.md

Support hot update of TCP/SSL/WS/WSS MQTT listeners configuration, which allows changing most of the configuration parameters without restarting the listener and disconnecting the clients.

In case of TCP/SSL listeners, changes to the following parameters still require full listener restart:

• bind
• tcp_options.backlog

In case of WS/WSS listeners, any parameter can be freely changed without losing the connected clients. However, changing transport related parameters will cause listening socket to be re-opened, namely:

• bind
• tcp_options.*
• ssl_options.*