1. Respecto a lo que dije en @gallir

    Hubo errores en Amazon, y parece que tenemos una especial predisposición a detectar y ser víctimas de todos los bugs ;)

    Thank you for your patience. We confirm that the connectivity issue you reported occurred after we initiated a failover to your standby node as part of the planned system upgrade. The failover completed successfully as expected; however, a defect in one of our DNS servers caused a propagating delay, which resulted in incorrect Name Resolution for the Endpoint of your DB Instance for a period of time after the failover. We identified the root cause of the DNS server defect and fixed it, and taken steps to prevent such occurrence. We apologize for the inconvenience this issue had caused you.   media