Exadata: Error with CABLE_CONN_STAT reported after upgrade to 2.1.3-4

Like the article the other day for cellsrv hanging that was also aimed at the X2-2 platform, tonight the My Oracle Support document "Component Error Detected. Component Name: /SYS/CABLE_CONN_STAT during the firmware upgrade to 2.1.3-4." via note 1642972.1 shows us why there are several reasons these errors can be recorded in /var/log/messages!