CONTAP-157218: Extended serial port buffer drain by SP during node shutdown might cause controller disruption
Issue
On occasion, the service processor (SP) might continue to fill the internal serial port connection with ONTAP software during a node shutdown. As a result, the SP might spend too much time inside the routine that tries to drain the serial port buffer. If the time spent passes a pre-determined threshold, the node might experience a system controller disruption during the shutdown.