mysql主从复制常见问题(useing version:8)

Fatal error: The slave I/O thread stops because master and slave have equal MySQL server ids; these ids must be different for replication to work (or the --replicate-same-server-id option must be used on slave but this does not always make sense; please check the manual before using it).

server_id相同,可以使用 show variables like '%server_id%'; 进行查询

解决办法:修改server_id

SET GLOBAL server_id = 1;

Coordinator stopped because there were error(s) in the worker(s). The most recent failure being: Worker 1 failed executing transaction 'ANONYMOUS' at master log binlog.000002, end_log_pos 5212. See error log and/or performance_schema.replication_applier_status_by_worker table for more details about this failure or others, if any.

master Position变更了

解决办法:修改MASTER_LOG_POS重启slave;

CHANGE MASTER TO
MASTER_HOST='source_host_name',
MASTER_USER='replication_user_name',
MASTER_PASSWORD='replication_password',
MASTER_LOG_FILE='recorded_log_file_name',
MASTER_LOG_POS=recorded_log_position;