The Errant GTID (opens in new tab)

Part 1 What is a GTID? Oracle/MySQL define a GTID as "A global transaction identifier (GTID) is a unique identifier created and associated with each transaction committed on the server of origin (the source). This identifier is unique not only to the server on which it originated, but is unique across all servers in a given replication topology." An errant transaction can make promotion of a replica to primary very difficult.