Qiong Zhou

@ruanwenjun I've integrated jdbc-registry in my project, so I'm wondering whether this improvement will add transaction support to methods `putJdbcRegistryData` and `deleteJdbcRegistryDataByKey`, thereby making them atomic?

@nikusu417 Full GC always on 1 of the 6 masters or randomly ? Full GC 是始终发生在其中某台master还是随机出现在各台master上?

@ruanwenjun After JDBC 4.0 (Java 6) DriverManager will invoke all the registered drivers' acceptsURL method to find out if it is the matched driver by the connection Url `jdbc:mysql://localhost:3306/dolphinscheduler` `jdbc:postgresql://localhost:5432/dolphinscheduler`...

> Some URLs may be matched by multiple drivers simultaneously, e.g., hive2 might be matched by hive/kyuubi driver, mysql might be matched by mysql/oceanbase driver? @ruanwenjun If multiple drivers are...

> So it would be better to get connection by driver rather than driver manager. @ruanwenjun Exactly!