The one producing the error is actually the local machine. It is a slave in the system, since this is a master-master configuration. I specify it because I want pt-online-schema-change to check for replication delays on both masters, not just one.
The one producing the error is actually the local machine. It is a slave in the system, since this is a master-master configuration. I specify it because I want pt-online- schema- change to check for replication delays on both masters, not just one.