vertx / io.vertx.rxjava.mqtt / MqttServer / exceptionHandler

# exceptionHandler

`open fun exceptionHandler(handler: Handler<Throwable>): MqttServer`

Set an exception handler for the server, that will be called when an error happens independantly of an accepted io.vertx.rxjava.mqtt.MqttEndpoint, like a rejected connection

### Parameters

`handler` - the exception handler

Return
a reference to this, so the API can be used fluently