public Builder<T> serverId(int serverId) {
            this.serverId = serverId;
            return this;
        }
A numeric ID of this database client, which must be unique across all currently-running
database processes in the MySQL cluster. This connector joins the MySQL database cluster
as another server (with this unique ID) so it can read the binlog. By default, a random
number is generated between 5400 and 6400, though we recommend setting an explicit value.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/mysql/MySqlSource.java