DQL 元数据连接数据库失败
连接的时候，提示如下错误
Communications link failure
The last packet successfully received from the server was 2 milliseconds ago. The last packet sent successfully to the server was 2 milliseconds ago.
Received fatal alert: protocol_version
"[图片] 连接的时候，提示如下错误 Communications link failure The last packet successfully received from the ser .."
连接的时候，提示如下错误
Communications link failure
The last packet successfully received from the server was 2 milliseconds ago. The last packet sent successfully to the server was 2 milliseconds ago.
Received fatal alert: protocol_version
已经解决，发现在 common 下有 2 个版本的数据库 jar，删掉低版本的就可以了