com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link [duplicate]

Answer 1

I finally figured it out. Thanks to Max and Yogendra for posting. The problem turned out to have been my XAMPP configuration. To fix it, I did as follows:

-   sudo vi /Applications/XAMPP/etc/my.cnf 
⁃   scroll down to `skip-networking`
⁃   comment it out by changing it to `#skip-networking`
⁃   save the changes.
⁃   restart mysql from XAMPP Console

Then I run my code and everything is fine!