how to understand “can't connect” mysql error messages?

Question

I have the following error message:

SQLSTATE[HY000] [2003] Can\'t connect to MySQL server on \'192.168.50.45\' (4)

How would I

Answer 1

I was just struggling with the same issue.

Disable the DNS hostname lookups solved the issue for me.

[mysqld] ... ... skip-name-resolve

Don't forget to restart MySQL to take effect.