牛！
刚测试了下，有个细节需要注意下：
刚刚测试4种语法，只有1和2的语法正确，port后面要加 /,最后一个可加可不加。
–sink-uri=“mysql://user:password@host1:port1/,host2:port2/”
–sink-uri=“mysql://user:password@host1:port1/,host2:port2”
–sink-uri=“mysql://user:password@host1:port1,host2:port2/”
–sink-uri=“mysql://user:password@host1:port1,host2:port2”
