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

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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.*`