Giuseppe Maxia
I am setting up multi-source replication with four nodes, where nodes 1, 2, and 3 are masters and node 4 is the slave of the first 3. The slave is *active*, meaning that it has a binary log and runs transactions of its own.
Got fatal error 1236 from master when reading data from binary log: 'Error: connecting slave requested to start from GTID 0-104-1, which is not in the master's binlog. Since the master's binlog contains GTIDs with higher sequence numbers, it probably means that the slave has diverged due to executing extra erroneous transactions'
I get the same result if I use 'slave_pos' instead of 'current_pos'.
You need to set gtid_domain_id different on each server: https://mariadb.com/kb/en/mariadb/global-transaction-id/#use-with-multi-sour... This way, your slave's GTID position can be multi-dimensional, effectively tracking the position in each server individually, eg: 1-101-50,2-102-100,3-103-90,4-104-1
From the error it looks like you do not have different gtid_domain_id configured, but else do ask again if you still have problems.
Hope this helps, - Kristian.