wangmingzhiJohn commented on issue #5729:
URL: 
https://github.com/apache/dolphinscheduler/issues/5729#issuecomment-871888717


   @ruanwenjun
   ```
   wangmingzhi@xxx:~/apache-dolphinscheduler-1.3.6-bin2$ telnet 202.168.126.69 
3306
   Trying 202.168.126.69...
   telnet: Unable to connect to remote host: Connection refused
   ```


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