Awaiting connection when request for a port that does not exist.

[geovanef46]

When trying to establish a connection to RabbitMQ using amqp and connection parameters:

 {
           hostname: 'hostname_ip',
           protocol: 'mqtt',
           port: 1883,
           username: 'user',
           password: 'user_pass'
 }

By default if port 1883 belongs to mqtt communications, but you want to connect amqp. *This will result in an error * - the promise will be rejected immediately.
But if used:

 {
           hostname: 'hostname_ip',
           protocol: 'amqp',
           port: 1883,
           username: 'user',
           password: 'user_pass'
 }

The promise cannot be resolved, and the connection request will wait until an application-defined limit (possible infinite loop).