mysql故障master and slave have equal MySQL server UU
mysql做主从复制，克隆一台mysql，做完主从复制后，发现I/O线程是NO，看日志提示“The slave I/O thread stops because master and slave have equal MySQL server UUIDs; these UUIDs must be different for replication to work. Error_code: 1593”，这是由于克隆机子，把data/auto.cnf 文件也克隆了，把从库的auto.cnf删除，从启mysql，在开启主从配置即可。